Shown with a cast-on count of 23 stitches.  

• Row 1 (RS): *K3, yo, ssk, k2, k2tog, yo, k2, repeat from * to last st, k1.
• Rows 2, 4, 6, 8, 10, and 12: Purl.
• Row 3: *K2, yo, k1, ssk, k2, k2tog, k1, yo, k1, repeat from * to last st, k1.
• Row 5: *K1, yo, k2, ssk, k2, k2tog, k2, yo, repeat from * to last st, k1.
• Row 7: *K1, ssk, k2, yo, k2, yo, k2, k2tog, repeat from * to last st, k1.
• Row 9: *K2, ssk, k1, yo, k2, yo, k1, k2tog, k1, repeat from * to last st, k1.
• Row 11: *K3, ssk, yo, k2, yo, k2tog, k2, repeat from * to last st, k1.