Right Index Finger:
K7, place the next 27 sts on waste yarn, CO 4 sts, join and k to end (22 sts on needles).
Next round: k6, ssk, k2, k2tog, k to end. (20 sts)
Next round: k5, ssk, k2, k2tog, k to end. (18 sts)
Knit 4 more rounds even, then BO loosely

Left Index Finger:
k9, place the next 27 sts on waste yarn, CO 4 sts, join and k to end (22 sts on needles).
Next round: k8, ssk, k2, k2tog, k to end. (20 sts)
Next round: k7, ssk, k2, k2tog, k to end. (18 sts)
Knit 4 more rounds even, then BO loosely.