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: ['a', 'y', '7401', 'e', 'l', '4351', 'p', '5673', 'k', '333', 'o', 'd', 'e', 'j', 'e', '9569', '1795', 'r', 'z', '6059', '4399', '2927', 'n', '9387', '9317', 'b', 'c', 'e']

A: a, b, c, d, e, j, k, l, n, o, p, r, y, z
****
Q: ['g', '7517', '3173', 'd', '2143', 'n', '8507', 'l', '8369', '225', 'e', 'l', '9511', 'p', '1317', '5651', 'p', '1125', 't', '739', '6453', 'l', 'g', '8555', '8075', 'x', 's', 'd']

A: d, e, g, l, n, p, s, t, x
****
Q: ['5701', 'e', '8581', '4129', '3341', '5549', 'f', '8733', 's', 'u', '6443', '8527', '6697', '7825', 's', '2103', '597', 'z', '2851', '1587', '2109', 'f', 'n', '1953', '6211', 'r', '1439', 'c', 'h', 'a', 'v', '7297', '5607', '8925']

A:
a, c, e, f, h, n, r, s, u, v, z
****