Question about Pomatomus socks

So, I started these…

http://www.knitty.com/ISSUEwinter05/PATTpomatomus.html

and I have a question about the pattern. I’ve finished the ribbing and about to start the leg and right from the get go I’m confused.

[Yo, k2tog, (p1, k1 tbl) five times] to end of round. (The sequence will be repeated twice for each needle, or 6 times in total.)

How do you YO at the beginning of a round?