Shown with a cast-on count of 24 stitches.  

• Row 1 (RS): *K2, yo, ssk, yo, k1, sl2-k1-p2sso, yo, k1, yo, k2tog, repeat from * to last 2 sts, k2.
• Rows 2, 4, 6, 8, and 19: Purl.
• Rows 3 and 7: K1, *k1, ssk, k1, yo, sl2-k1-p2sso, yo, k1, k2tog, k1, repeat from * to last st, k1 (multiple of 9 sts, plus 2).
• Rows 5 and 9: K1, *k1, yo, ssk, yo, k3, yo, k2tog, yo, k1, repeat from * to last st, k1 (multiple of 11 sts, plus 2).