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: ['3821', '385', 'y', '8457', '6623', 'g', '5923', 'a', '7193', 'v', 'm', '8915', 'v', '5873', 'p', 't', 'w', 'y', '3617', 'h', 'w', 'j', '8047', 'u', '2271', 'v', 'a', '2181', 's', '1051', 'b', 'a', '9967', '987', 'z', '2255', '6349', '1249', '1397', 'q']
Example Output: a, b, g, h, j, m, p, q, s, t, u, v, w, y, z

Example Input: ['1487', '8003', 'd', '7237', 'l', 'y', '2749', 'e', '9685', '2825', 'z', '7743', 'r', '9617', 'w', '4323', '2173', '8419', '2831', '8923', 'l', '2985', '303', 'y', '9409', 'i', 'h', 'e']
Example Output: d, e, h, i, l, r, w, y, z

Example Input: ['o', 'k', '8959', '6015', '4597', '5453', '801', '8701', 'd', '3667', 'a', '1653', '8825', '4721', 'u', 'e', 'j', 'z', '2029', '9913', 'p', 'p', '8223', '8987', 'z', 'v', '8517', '7003', 'k', '9019', '9855', '5881', '519', 'a', 's', 'b', '7087', '421']
Example Output:
a, b, d, e, j, k, o, p, s, u, v, z