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.

['2505', '4199', 'e', '5433', '8795', 'q', 'i', '9357', 'o', '257', '8235', 'b', '1339', 'w', '1463', 'm', '277', '3211', '3863', 'r', 'm', 'i', '5793', '7451', '4787', '4739', 'k', 't', 'o', '7453', '9385', 'v', 'l', 'y', 'f', 'r', 'p', 'w']
b, e, f, i, k, l, m, o, p, q, r, t, v, w, y

['v', '6635', '5395', '3263', '4391', 'h', '1521', 'f', '9861', '6125', '1673', '3679', '8681', '4967', 'f', 'a', 'c', 'k', 'n', '4155', 'e', 'm', 'i', '1699', 'r', 'f', 'u', 'r', '3451', 'v', '7239', 'o', '4359', 'l', 'a', '2925']
a, c, e, f, h, i, k, l, m, n, o, r, u, v

['a', '1705', '595', 'w', 'd', 'y', '9991', 'd', 'j', '7809', 'j', 'j', '2745', 'v', '9703', 'k', 'h', 'o', '6517', 'b', 's', '3119', 'u', '7635', '251', 'a', 'a', 'p', 'l', '355']

a, b, d, h, j, k, l, o, p, s, u, v, w, y