Shown with a cast-on count of 33 stitches.  

• Row 1 (RS): K4, [k5, k2tog, yo, k1, yo, ssk] twice, k9.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, and 28: Purl.
• Row 3: K5, [k3, k2tog, yo, k3, yo, ssk] twice, k8.
• Row 5: K7, k2tog, yo, k6, yo, sl1-k2tog-psso, yo, k6, yo, ssk, k7.
• Row 7: K7, ssk, yo, k6, yo, sl1-k2tog-psso, yo, k6, yo, k2tog, k7.
• Row 9: K8, ssk, yo, k5, yo, sl1-k2tog-psso, yo, k5, yo, k2tog, k8.
• Row 11: K9, [k2tog, yo] 3 times, k3, [yo, ssk] 3 times, k9.
• Row 13: K8, k2tog, yo, k5, yo, sl1-k2tog-psso, yo, k5, yo, ssk, k8.
• Row 15: K6, k2tog, yo, k7, yo, sl1-k2tog-psso, yo, k7, yo, ssk, k6.
• Row 17: K5, [k2tog, yo, k3] twice, yo, sl1-k2tog-psso, yo, [k3, yo, ssk] twice, k5.
• Row 19: K5, [k2tog, yo, k2] twice, k2, yo, sl1-k2tog-psso, yo, k4, [yo, ssk, k2] twice, k3.
• Row 21: K5, [k2tog, yo, k1] twice, k4, yo, sl1-k2tog-psso, yo, k5, [yo, ssk, k1] twice, k4.
• Row 23: [K5, k2tog, yo] twice, k1, yo, sl1-k2tog-psso, yo, k1, [yo, ssk, k5] twice.
• Row 25: K2, [k3, k2tog, yo] twice, k2, k2tog, yo, k1, yo, ssk, k2, [yo, ssk, k3] twice, k2.
• Row 27: K6, [k2tog, yo] twice, k3, k2tog, yo, k3, yo, ssk, k3, [yo, ssk] twice, k6.
• Row 29: BO (0 sts).