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.

Q: ['w', 'i', '4383', '7667', '9617', 'y', 'a', '8051', 'w', '4857', 'y', '3953', 'u', 'o', 'y', 'i', '9201', 'g', '1807', '5367', 'g', '5263', '3995', '6665', '3113', '9433', '6315', 'm', '845', 'x', 'c', 'v', 'h', '1491', 'g', '3519', 'x', 'b', '7695']

A: a, b, c, g, h, i, m, o, u, v, w, x, y
****
Q: ['f', 'a', 'r', '4009', 'k', 'a', 'g', '7725', 'v', 'b', '6705', 'a', '6583', '3159', 'c', 'w', 'x', 'h', '7625', 'p', 'y', '5645', 'k', 'r', 'j', '4175', 'r', '3103', '8631', '5999', 'p', 'g', 'h']

A: a, b, c, f, g, h, j, k, p, r, v, w, x, y
****
Q: ['u', '9235', 'q', '9797', 'i', 'y', 'u', '711', 'p', '4097', '2571', '2463', 'd', 'z', '1949', '5711', 'c', 'r', 'n', 'w', '3151', '7409', 'j', 'a', '8031', '4693', '8777', 'y', 'z', '7875', '5439', '2733', '4005', '5485', '2311', '9321', '3737']

A:
a, c, d, i, j, n, p, q, r, u, w, y, z
****