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.

Example Input: ['2409', 'q', 'w', 'e', 'x', '4737', 'w']
Example Output: e, q, w, x

Example Input: ['s', '6723', 'l', '1573', '1129', 'n', '4277', '5003', 'y', '7563', 'c', '6747', '3105', 's', '3593', '8417', '8253', '4157', 'w', 'f', 'z', 'd', '9685', '1033', 'h', '4893', 't', 'j', '6821', 'z', 'a', 'u', '591', 'o', '1087', '2147', '1223', '2339', 'i', 'y', '9307', 'x', 'z', 'r', 'y']
Example Output: a, c, d, f, h, i, j, l, n, o, r, s, t, u, w, x, y, z

Example Input: ['j', '41', 'e', '8857', 'm', '8685', '7591', 'p', '8167', 'w', 'e', 'x', '2173', '813', '7477', '9035', '2717', 's', '6719', 's', '8089', 'q', '7461', '1831', '1353', '5199', '7075', '9601', '7911', 'x', 's', 'p']
Example Output:
e, j, m, p, q, s, w, x