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: ['i', '1191', '5581', '2527', 'g', '9795', '519', 'u', '8389', '9793', 'k', '5733', '7125', '7835', 'j', '855', 'd', 'd', '6555', '3211', 'l', 'o', 'b', '523', 'x', 'j', '1707', '4161', '7171', 'h', 'h', 'm', 'h', '2443', 'e', '649', '951', 'n', 'h']
Example Output: b, d, e, g, h, i, j, k, l, m, n, o, u, x

Example Input: ['j', 'h', '4399', '4093', 'j', '8825', '8583', 'd', '5531', 'e', 'm', '5491', 'd', 'k', 'j', 'm', '51', '8087', '7453', 'j', '4783', 'e', '1709', 'p', 'o', 'm', 'c', '1039', '7701', '789', 'o', '4907', '6781', '7163', '8897', '1479', '6325']
Example Output:
c, d, e, h, j, k, m, o, p