Shown with a cast-on count of 22 stitches.  

• Row 1 (RS): *Ssk, k1, k2tog, yo, k1, yo, ssk, k1, k2tog, repeat from * (multiple of 9 sts).
• Rows 2, 4, 6, 8, 10, and 12: Purl.
• Row 3: *K1, yo, k2tog, yo, k3, yo, ssk, yo, k1, repeat from * (multiple of 11 sts).
• Rows 5 and 9: *K2, yo, k2, sl1-k2tog-psso, k2, yo, k2, repeat from *.
• Row 7: *K2, yo, ssk, k3, k2tog, yo, k2, repeat from *.
• Row 11: *K2, k2tog, yo, k3, yo, ssk, k2, repeat from *.