Shown with a cast-on count of 159 stitches.  

• Row 50 (RS): K3, yo, k5, yo, k1 tbl, yo, [k3tog, k3, yo, k1, yo, k3, sl1-k2tog-psso, yo, k1 tbl, yo, k3, yo, k1 tbl, yo] 3 times, k3tog, k3, yo, k1, yo, k3, sl1-k2tog-psso, yo, k1 tbl, yo, k2, yo, k1, yo, k2, yo, k1 tbl, yo, k3tog, k3, yo, k1, yo, k3, sl1-k2tog-psso, [yo, k1 tbl, yo, k3, yo, k1 tbl, yo, k3tog, k3, yo, k1, yo, k3, sl1-k2tog-psso] 3 times, yo, k1 tbl, yo, k5, yo, k3 (179 sts).
• Row 51: K3, yo, p173, yo, k3 (181 sts).
• Row 52: K3, yo, k1, [yo, [sl1-k2tog-psso, yo] 3 times, k3, k2tog, (k1, yo, k1) in next st, ssk, k3] 4 times, yo, [sl1-k2tog-psso, yo] twice, (k1, yo, k1) in next st, yo, [sl1-k2tog-psso, yo] twice, [k3, k2tog, (k1, yo, k1) in next st, ssk, k3, yo, [sl1-k2tog-psso, yo] 3 times] 4 times, k1, yo, k3 (167 sts).
• Row 53: K3, yo, p161, yo, k3 (169 sts).