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: ['1487', '8003', 'd', '7237', 'l', 'y', '2749', 'e', '9685', '2825', 'z', '7743', 'r', '9617', 'w', '4323', '2173', '8419', '2831', '8923', 'l', '2985', '303', 'y', '9409', 'i', 'h', 'e']
Example Output: d, e, h, i, l, r, w, y, z

Example Input: ['5159', '6407', '4021', '6655', 'c', 'k', 'w', '7191', 'l', '4321', '1609', 'm', '1991', '9261', '511', 'p', '7495', 'b', 'e', '4647', '2711', 'd', 'y', '3835', '5037', '3613', '2695', '3367', 'm', 'j', 'y', '9561', '4889', 'a', 'z', '2253', 'p', 't', 's', '8371', '2859', 's']
Example Output: a, b, c, d, e, j, k, l, m, p, s, t, w, y, z

Example Input: ['3139', 'w', '1825', 'g', '5117', '6217', 'n', 'r', '3325', 'q', 't', '6681', '199', 'z', 't', '1363', '81', '2727', '2881', 'm', 'g', '1243']
Example Output:
g, m, n, q, r, t, w, z