Shown with a cast-on count of 38 stitches.  

• Row 1 (RS): K38.
• Rows 2, 4, 6, and 8: K2, purl to last 2 sts, k2.
• Row 3: K5, [k2tog, yo, ssk, k7] 3 times (35 sts).
• Row 5: K4, [k2tog, yo, k1, yo, ssk, k5] 3 times, k1.
• Row 7: K3, [k2tog, yo, k3, yo, ssk, k3] 3 times, k2.
• Row 9: K4, [yo, k1, sl1-k2-psso, k1, yo, k5] 3 times, k1 (38 sts).
• Row 10: Purl.