Shown with a cast-on count of 21 stitches.  

• Rows 1, 3, 7, and 15 (RS): *K3, yo, ssk, k2tog, yo, k3, repeat from * to last st, k1.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, and 18: Purl.
• Rows 5 and 17: *K2, yo, ssk, k3, k2tog, yo, k1, repeat from * to last st, k1.
• Rows 9 and 13: *K2, yo, ssk, yo, sl2-k1-p2sso, yo, k2tog, yo, k1, repeat from * to last st, k1.
• Row 11: *K1, yo, ssk, k5, k2tog, yo, repeat from * to last st, k1.