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]: ['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']
[A]: d, e, h, i, l, r, w, y, z


[Q]: ['5611', 'x', 't', 'p', '5711', '7079', '5251', '429', 'z', 'u', '8721', '9321', '79', 'i', '189', '3605', 'k', '445', 'r', 'k', 'o', '2189', '8521', '8849', '2651', 'm', '4149', '1577', '3085', '5275', '6413', '5265', '6089', 'r', 'f', '5013']
[A]: f, i, k, m, o, p, r, t, u, x, z


[Q]: ['6355', '9099', '5637', '9725', 'i', '1375', 'a', '4031', 'k', 'm', 'j', '8229', 'o', 'g', '3193', '7833', 'u', '4165', '3609', '2771', 'o', 'y', 'n', '5283', '1085', 'q', 'u', '9323', '6061', '5445', 'q', '9741', 'n', '2343', 'c', 'a', 'k', 'w', 'r', '6169', '2233', 'o', '9945', '9275', '7305']
[A]:
a, c, g, i, j, k, m, n, o, q, r, u, w, y