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: ['a', 'y', '7401', 'e', 'l', '4351', 'p', '5673', 'k', '333', 'o', 'd', 'e', 'j', 'e', '9569', '1795', 'r', 'z', '6059', '4399', '2927', 'n', '9387', '9317', 'b', 'c', 'e']
Example Output: a, b, c, d, e, j, k, l, n, o, p, r, y, z

Example Input: ['e', 'c', '4241', '2685', 'o', '9859', 'z', '2647', 'b', 'c', 'y', '1985', '5985', '5709', '6655', 'q', 'z', '9933', '6817', '6477', '1837', 'x', 'p', '9251', '3787', 'v', '5741', 'e', 'p', '493', '5949', '5519', 'v', 'g', '1403', 'z', 'h', 'z']
Example Output: b, c, e, g, h, o, p, q, v, x, y, z

Example Input: ['6649', '745', 'e', '3173', '9947', 'r', '2255', 'g', '8749', 'v', '1079', 'z', 'o', '3583', 'h', 'o', 'z', '965', 'm', 'c', 'z', '5963', 'a', '353', '1653', 'w', '6547', 'b', '3355', '7515', '5547', 'e', '8325', '585']
Example Output:
a, b, c, e, g, h, m, o, r, v, w, z