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: ['7065', 'q', 't', '3177', '9035', 'i', 'l', 'd', '8961', '1183', '6507', 'u', 'c', 't', '2467', '7659', 'e', '8963', 'j', 'g', 'p', '6779', '7115']
Example Output: c, d, e, g, i, j, l, p, q, t, u

Example Input: ['u', 'w', '401', 't', 'g', 'h', 'g', '8073', '9597', '1347', '7835', '5007', '977', 'p', '7679', 'b', '4883', '4931', '999', 'r', '1181', 'x', '2063', 'l', 'w', 'i', 'l', 'x', 'i', '9057', '5007', 'w', '743', '1635', 'y', 'f', '9227', 'z', '5227', 'd', '7129', 'k', '7657']
Example Output: b, d, f, g, h, i, k, l, p, r, t, u, w, x, y, z

Example Input: ['k', 'b', '495', 'z', '7803', '3193', 'j', '5979', '5295', '1317', '4797', 'z', 'm', 'c', '489', 'b', '4491', 'u', 'x', 'e', '9119', '4149', 'b', 'j', 'd', 'f', '6149', 'q', 'u', '4511', '1051', 'k', '8179', 'm', 'g', '205', '5463', '9475', '7455', 'b', 'v', '7939', 'n', 'x']
Example Output:
b, c, d, e, f, g, j, k, m, n, q, u, v, x, z