Daniel

Halla, hva skjer a?

Prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek prek pr