Shown with a cast-on count of 53 stitches.  

• Row 15 (RS): K2, yo, k2, yo, k2, yo, k2tog, k2, yo, knit to last 2 sts, k2 (56 sts).
• Rows 16, 18, 20, 22, 24, and 26: K2, purl to last 2 sts, k2.
• Row 17: K2, yo, k2, yo, k2, yo, k2tog, k2, yo, knit to last 2 sts, k2 (59 sts).
• Row 19: K2, yo, k3, yo, k2tog, k4, yo, k2tog, k2, yo, k3, yo, k2tog, k4, yo, k2tog, k2, yo, k2tog, k1, ssk, yo, k4, ssk, yo, k3, yo, k2, ssk, yo, k4, ssk, yo, k3, yo, k4 (63 sts).
• Row 21: K2, yo, k2, yo, k2, yo, k2tog, k2, yo, knit to last 2 sts, k2 (66 sts).
• Row 23: K2, yo, k2, yo, k2, yo, k2tog, k2, yo, knit to last 2 sts, k2 (69 sts).
• Row 25: K2, yo, k3, yo, k2tog, k4, yo, k2tog, k5, yo, k3, yo, k2tog, k4, yo, k2tog, k5, yo, k2tog, k4, ssk, yo, k4, ssk, yo, k3, yo, k5, ssk, yo, k4, ssk, yo, k3, yo, k2 (73 sts).