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: ['7441', '7967', '2011', '1383', 'i', '3623', 'b', 'y', 'e', '1593', 'r', 'a', 'd', 'b', '6159', '3931', '989', '435', 'o', 'y', 'j', 'w', '7669', 'y', '5781', 'u', '531', '7467', '3971', '8139', 'w', 'a', '5113', '9461', '8377', '7431', '6975', '6055', '7307', 'v']
Example Output: a, b, d, e, i, j, o, r, u, v, w, y

Example Input: ['1945', 't', '4477', '4439', '6569', '2021', 'y', 't', '2725', '8947', '6921', '1373', '8107', 'g', 'c', 'w', 'x', 'b', '9117', 'k', '6567', '5073', '2307', 'e', 'b', '7405', 'e', 'x', '1419', 'd', 'o', 'n', 'a', '2647', 'z', '1459', 'n', '6137', 'u', 'b', 'q', '4459']
Example Output: a, b, c, d, e, g, k, n, o, q, t, u, w, x, y, z

Example Input: ['k', 'y', '2675', 'd', '3229', '1157', 'i', 'j', '5357', '327', 's', '1177', 'b', 'n', '365', 'p', '6265', 'w', 'w', 'm', '8609', '1779', 'e', 'y', '9789', '547', 'd', '8031']
Example Output:
b, d, e, i, j, k, m, n, p, s, w, y