Shown with a cast-on count of 49 stitches.  

• Row 21 (RS): Sl1 wyif, k2, yo, k21, M1R, k1, M1L, k21, yo, k2, k1 tbl (53 sts).
• Row 22: Sl1 wyif, k3, p45, k3, k1 tbl.
• Row 23: Sl1 wyif, k2, yo, k1, [sl1 wyib, k1] 11 times, M1R, k1, M1L, [k1, sl1 wyib] 11 times, k1, yo, k2, k1 tbl (57 sts).
• Row 24: Sl1 wyif, k3, p1, [sl1 wyif, p1] 11 times, p3, [p1, sl1 wyif] 11 times, p1, k3, k1 tbl.
• Row 25: Sl1 wyif, k2, yo, k1, [sl1 wyib, k3] 6 times, M1R, k1, M1L, [k3, sl1 wyib] 6 times, k1, yo, k2, k1 tbl (61 sts).
• Row 26: Sl1 wyif, k3, p1, [sl1 wyif, p3] 6 times, p3, [p3, sl1 wyif] 6 times, p1, k3, k1 tbl.
• Row 27: Sl1 wyif, k2, yo, k3, [k1, sl1 wyib, k2] 6 times, M1R, k1, M1L, [k2, sl1 wyib, k1] 6 times, k3, yo, k2, k1 tbl (65 sts).
• Row 28: Sl1 wyif, k3, p3, [p1, sl1 wyif, p2] 6 times, p3, [p2, sl1 wyif, p1] 6 times, p3, k3, k1 tbl.
• Row 29: Sl1 wyif, k2, yo, k29, M1R, k1, M1L, k29, yo, k2, k1 tbl (69 sts).
• Row 30: Sl1 wyif, k3, p61, k3, k1 tbl.