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:
['2527', '9123', '8717']

Ex Output:
-1

Ex Input:
['9783', '3185', '8225', 'u', '1123', 'd', '3453', 'i', '7713', '8457', '8609', 'h', '2767', 'e', '7191', '2929', '1089', '393', 'e', 'd', '11', '9329', '683', '1271']

Ex Output:
d, e, h, i, u

Ex Input:
['5487', 'h', '3177', '773', 'f', 'm', '7125', '9543', '4341', 'c', '3593', 'd', '5583', 't', 'a', '533', '3679', 'y', '4001', '5011', 'n', 'a', 'n', '3325', 'q', '3709']

Ex Output:
a, c, d, f, h, m, n, q, t, y