Shown with a cast-on count of 139 stitches.  

• Row 1 (RS): K2, yo, k1, yo, k7, ssk, [k2tog, k7, yo, [k1, yo] 4 times, k7, ssk] twice, k2tog, k8, yo, [k1, yo] 7 times, k8, ssk, [k2tog, k7, yo, [k1, yo] 4 times, k7, ssk] twice, k2tog, k7, yo, k1, yo, k2 (159 sts).
• Row 2: K11, ssk, [k3tog, k9, kfb, k9, sl1-k2tog-psso] twice, k3tog, k27, sl1-k2tog-psso, [k3tog, k9, kfb, k9, sl1-k2tog-psso] twice, k2tog, k11 (141 sts).
• Row 3: K2, yo, k1, yo, k7, ssk, [k2tog, k7, yo, [k1, yo] 4 times, k7, ssk] twice, k3tog, k8, yo, [k1, yo] 7 times, k8, sl1-k2tog-psso, [k2tog, k7, yo, [k1, yo] 4 times, k7, ssk] twice, k2tog, k7, yo, k1, yo, k2 (159 sts).
• Repeat rows 2-3.