Shown with a cast-on count of 83 stitches.  

• Row 1 (RS): K5, k2, yo, k1, ssk, k3, k2tog, k1, *yo, k1, yo, k1, ssk, k3, k2tog, k1, repeat from * to last 7 sts, yo, k2, k5.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20: K5, p73, k5.
• Rows 3 and 17: K5, k3, *yo, k1, ssk, k1, k2tog, k1, yo, k3, repeat from * to last 5 sts, k5.
• Row 5: K5, k4, yo, k1, sl1-k2tog-psso, k1, yo, *k5, yo, k1, sl1-k2tog-psso, k1, yo, repeat from * to last 9 sts, k4, k5.
• Rows 7 and 13: K5, k2, k2tog, k1, yo, k3, yo, k1, ssk, *k1, k2tog, k1, yo, k3, yo, k1, ssk, repeat from * to last 7 sts, k2, k5.
• Row 9: K5, k1, ssk, k2, yo, k3, yo, k2, *sl1-k2tog-psso, k2, yo, k3, yo, k2, repeat from * to last 8 sts, k2tog, k1, k5.
• Row 11: K5, k3, *k2tog, k1, yo, k1, yo, k1, ssk, k3, repeat from * to last 5 sts, k5.
• Row 15: K5, k1, ssk, k1, yo, k5, yo, k1, *sl1-k2tog-psso, k1, yo, k5, yo, k1, repeat from * to last 8 sts, k2tog, k1, k5.
• Row 19: K5, k3, *yo, k2, sl1-k2tog-psso, k2, yo, k3, repeat from * to last 5 sts, k5.