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 Input:
['7109', '1243', 'f', 'z', 'h', 'd', '6169', 'v', 'h', '3609', '3181', 'd', '3661', '7193', '7341', '9127', 'r', '1623', '5813', 's', 'd', '4011', '4983', 'n', '4195']

Ex Output:
d, f, h, n, r, s, v, z


Ex Input:
['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']

Ex Output:
e, f, i, j, r, s, u, v, w


Ex Input:
['o', 'v', 's', '8041', '3711', 'e', 't', 'u', 'k', 'n', 'o', '7719', '1793', '6109', 'r', 'h', 'r', '1993', '3535', '9769', 'p', '1093', 'q', 'e', 't', 'r', '6273', 'w', '7325', 'x', 'g', 'h']

Ex Output:

e, g, h, k, n, o, p, q, r, s, t, u, v, w, x