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]: ['7203', '8715', '3193', 'w', '7159', '8535', 'i', '2425', 'j', 'f', '6709', 'w', 'w', 's', 'e', '9337', 'r', 'r', '5255', '1707', 'u', '1443', 'e', 'e', 'v']
[A]: e, f, i, j, r, s, u, v, w


[Q]: ['w', '1349', '3393', '7507', '2469', '8531', 'w', '6845', 'k', 'q', '2401', 'f', 'g', 'l', 'n', 'n', 'e', 'q', 'y', 'v', '3077', '4167', 'b', '5517', 'b']
[A]: b, e, f, g, k, l, n, q, v, w, y


[Q]: ['i', 'b', '8561', 'h', 'f', 'g', '4017', 'd', '6351', '5435', '967', 'l', 'f', 'a', '463', '8325', '177', '5629', '8069', '2987', '2963', '5057', 'c']
[A]:
a, b, c, d, f, g, h, i, l