In this task, you are given an input list A comprising of numbers and alphabets. You need to extract and sort the unique alphabets in the list. The alphabets in the input list will only be in lowercase. Return -1 if there is no alphabet in the input list.

['135', 'u', '3435', '2985', '9811', 'y', '4309', '9757', '905', 'd', 'g', 'q', '1457', 'l', 'o', 'u', '4517', '2333', '3327', '577', 'a', '4041', '8101', '6211', 'f', 'j', '1721', '7217', 'q', '7443', '8477', '3117', '7779', '9339', '8615', 'm', 'c', 'f', 'c', '8979', '7895', 'k', 'w', '1619']
a, c, d, f, g, j, k, l, m, o, q, u, w, y

['9425', 'l', 'c', 'n', '5925', '2543', '3935', 'c', '7533', 'j', 'q', '3775', '5897', '9435', '69', 'e']
c, e, j, l, n, q

['3345', '7315', '3201', 't', 'r', 'q', '3265', '9853', 'f', '3463', 'd', 'n', '7971', '9097', '6921', '5033', 'h', '5065', 'v', 'o', '7707', 'l']

d, f, h, l, n, o, q, r, t, v