Help With Directions!

I have 33 stitches on my left needle and the directions for the bootie says the following;

Row 23: K 14, [B][U]inc in each of next 4 sts[/U][/B], knit 15

My question is; What kind of [B]increase[/B] should I use in the next 4 stitches, if it doesn’t say?
Please help me with this one.

Thank you

I responded to this in General Knitting.