Understansing instructions

Hello I am having trouble understanding the pattern or how to execute instructions.
Row 3 - K to last 15 sts, P2, C4B, K2, C4F, P3.
My trouble is with the C4B and C4F.
Thanks

Hi!

C4B means cable 4 stitches behind and C4F means to cable 4 stitches in front . If you google C4B and C4F it will give you thr options of explanations or of videos . I hope this helps if not give me a shout.

Your pattern may define C3B and C4F but just to be clear, you will be moving 2sts to the back for C4B, then knitting the next 2sts and finally the 2sts on the cable needle. For C4F, it’s 2sts to the front, then knit the next 2sts and finally the 2sts on the cable needle.
Here’s a rather clear video that may help (no sound):