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', '1797', '8211', 'n', 'r', '7707', '2063', '4655', 'x', '5521', '8327', 'g', '7659', 'i', 'x', 'w', '9465', '4625', 'q', '5377', 'r', '225', 'r', 'i', 'e', '4163', 'g', 'g', '3537', 's']
Example Output: e, g, h, i, n, q, r, s, w, x

Example Input: ['6181', 'w', '4663', '5507', 'a', '6607', '869', '2669', 'r', '3629', 'r', 'l', '6599', '8885', 's', '4315', 'z', 'l', 'r', '1225', '8371', '1545', '7169', '1175', 'k', 'p', 'y', '7263', '5537', '8649', '3317', 'q', 'r', 'u', 'd', '4647', 'u', 'y', 'h', '9753', 'q', '725']
Example Output: a, d, h, k, l, p, q, r, s, u, w, y, z

Example Input: ['35', 'i', '8925', '8405', 's', '2533', '7705', '1511', '7323', 't', '9063', 'l', 't', '77', '4347', '4245', '665', 'v', 'p', 'j', 'v', 'd', 'f', 'd', '1489', 'o', '4175', '1175', '2471', 'o', '8767', 't', 'p', '5413']
Example Output:
d, f, i, j, l, o, p, s, t, v