Shown with a cast-on count of 27 stitches.  

• Row 1 (RS): K2, (k1, yo, k1) in next st, *k3, k2tog, yo, k1, yo, ssk, k2, repeat from * to last 4 sts, k1, (k1, yo, k1) in next st, sl2 wyib (multiple of 10 sts, plus 11).
• Rows 2, 4, 6, 8, 10, 12, and 14: K2, yo, purl to last 2 sts, yo, sl2 wyif (2 more sts).
• Row 3: K2, (k1, yo, k1) in next st, ssk, k1, *k2, k2tog, yo, k1, k2, yo, ssk, k1, repeat from * to last 7 sts, k3, k1, yo, (k1, yo, k1) in next st, sl2 wyib (multiple of 10 sts, plus 17).
• Row 5: K2, (k1, yo, k1) in next st, k3, yo, ssk, *k1, k2tog, yo, k2, k3, yo, ssk, repeat from * to last 11 sts, k1, k2tog, yo, k2, k3, (k1, yo, k1) in next st, sl2 wyib (multiple of 10 sts, plus 23).
• Row 7: K2, (k1, yo, k1) in next st, yo, k3, k4, yo, *sl2-k1-p2sso, yo, k3, k4, yo, repeat from * to last 5 sts, k2, (k1, yo, k1) in next st, sl2 wyib (multiple of 10 sts, plus 21).
• Row 9: K2, (k1, yo, k1) in next st, k2, yo, *k1, yo, k2, k2tog, k1, ssk, k2, yo, repeat from * to last 8 sts, k1, yo, k2, k2, (k1, yo, k1) in next st, sl2 wyib (multiple of 10 sts, plus 19).
• Row 11: K2, (k1, yo, k1) in next st, k2tog, ssk, k2, yo, *k1, yo, k2, k2tog, k1, ssk, k2, yo, repeat from * to last 12 sts, k1, yo, k2, k2tog, k1, ssk, k1, (k1, yo, k1) in next st, sl2 wyib (multiple of 10 sts, plus 23).
• Row 13: K2, (k1, yo, k1) in next st, k1, k2tog, k1, ssk, k2, yo, *k1, yo, k2, k2tog, k1, ssk, k2, yo, repeat from * to last 14 sts, k1, yo, k2, k3tog, sl1-k2tog-psso, k2, (k1, yo, k1) in next st, sl2 wyib.