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.

[EX Q]: ['x', 'o', '8161', 's', '3653', 'v', 'c', 'e', '5353', 'h', '9145', '333', 's', '7689', '8277', 'a', 'o', 'h', 'z', 'w', '9297', 'w', '9383', '8963', 'k', 'x', 's', 'w', 'h', 'j', '5737', 'o', '2247', '3723', '2043', '4615']
[EX A]: a, c, e, h, j, k, o, s, v, w, x, z

[EX 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']
[EX A]: f, i, k, m, o, p, r, t, u, x, z

[EX Q]: ['m', 'm', 'c', '1413', '8077', 't', '7905', '2973', 'v', 'u', '7701', 'j', 'i', 'q', 'h', 'h', '7245', 'k', 'y', '9209', '3457', '4913', '7941', 'v']
[EX A]:
c, h, i, j, k, m, q, t, u, v, y