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.

Input: Consider Input: ['6495', '2259', '8213', 'm', 'y', '3377', 'q', 'i', '1299', 's', 'w', '4331', 'h', '5459', '4059', '6637', '8069', '5367', '6025', 'l', 'v', '4503', 'd', 'x', 'w', '5067', '9019', 'd', '7919', '7299', 'v', '8957', 'v', '5341', '2617', '8169', 'n', 'y']

Output: d, h, i, l, m, n, q, s, v, w, x, y


Input: Consider Input: ['6181', 'w', '4663', '5507', 'a', '6607', '869', '2669', 'r', '3629', 'r', 'l', '6599', '8885', 's', '4315', 'z', 'l', 'r', '1225', '8371', '1545', '7169', '1175', 'k', 'p', 'y', '7263', '5537', '8649', '3317', 'q', 'r', 'u', 'd', '4647', 'u', 'y', 'h', '9753', 'q', '725']

Output: a, d, h, k, l, p, q, r, s, u, w, y, z


Input: Consider Input: ['1601', 'l', 'e', 'm', 'd', '2197', 'g', 'v', '5097', 'p', '4073', '7465', 't', '8157', 'g', '2681', 's', '9267', '5079', 'v', '5985', '7343', '6655', 'n', '601', '307', 'y', 'h', 'q', 's', '1591', 'w', 'a', '9787', '5811', '6151', 'l']


Output: a, d, e, g, h, l, m, n, p, q, s, t, v, w, y