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: ['t', 'r', '2959', '2517', 'a', '9959', '729', '511', 'y', 'r', '465', 'c', '687', 'm', 'b', 'm', '3449', '9713', 'g', '8275', '8823', 'a', 'z', 'w', '2185', '6283', '8457', '8137', '7163', '8329']

A: a, b, c, g, m, r, t, w, y, z
****
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']

A: a, c, e, h, j, k, o, s, v, w, x, z
****
Q: ['b', 'n', 'h', '9961', 'u', 'p', '7737', 'n', '8729', 'q', '7249', 'z', 'n', '7889', '9573', 'i', 'o', '6531', '5589', '1611', 'p', 'y', '2839', '2839', 'f', '9223', '2595']

A:
b, f, h, i, n, o, p, q, u, y, z
****