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.

Example Input: ['h', 'b', '9601', 'h', 'h', 'h', '8099', '8265', 'i', 'd', '8791', 'p', '8059', '4309', '501', '2581', '9837', '157', '4785', '5925', 'q', '8491', '4779', 'r', 'l', 'k', '3679', 'v', 'g', 'g', '9731', '1909', '9783', 'f', '4293', '5009', 'o', '3057', '3157', 'c', '5587', 'b', 'f', 'd', 'k']
Example Output: b, c, d, f, g, h, i, k, l, o, p, q, r, v

Example Input: ['h', 'v', '1263', 'y', '3299', 'd', 'a', 'h', 's', '2007', '7597', '1015', 'k', '6643', '6959', 'g', 'u', 'd', '5737', 'n', 'z', 'y', 'b', 'g', '9059', '7349', 'j', 'w', 'i', 'z', 'p', '5809', 'x', '4421', 'g', '6399', '3965']
Example Output: a, b, d, g, h, i, j, k, n, p, s, u, v, w, x, y, z

Example Input: ['533', '9059', '6983', 'l', '3131', '8365', 'h', 'v', 'a', '7455', 'x', '1245', '7459', 'o', '5711', '3097', '7193', 'o', '3013', 'w', 'k', 'j', 'z', '7141', 'e', 's', '9719', 'z', 'k', '6723', '8609', '3341', '2317', '3279', 'l', 'x', '3733', 's']
Example Output:
a, e, h, j, k, l, o, s, v, w, x, z