Shown with a cast-on count of 19 stitches.  

• Row 1 (RS): *K1, yo, ssk, k1, k2tog, yo, repeat from * to last st, k1.
• Rows 2, 4, 6, 8, 10, and 12: Purl.
• Rows 3 and 9: K2, *yo, k3, repeat from * to last 2 sts, yo, k2 (multiple of 4 sts, plus 5).
• Row 5: Ssk, *yo, k2tog, k1, ssk, yo, sl2-k1-p2sso, repeat from * to last 7 sts, yo, k2tog, k1, ssk, yo, k2tog (multiple of 6 sts, plus 7).
• Row 7: K1, *k2tog, yo, k1, yo, ssk, k1, repeat from *.
• Row 11: K1, *ssk, yo, sl2-k1-p2sso, yo, k2tog, k1, repeat from * (multiple of 6 sts, plus 1).