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: ['1447', 'q', '9529', '2971', 's', '7351', '6753', '3493', 'v', 'c', 'x', '3097', '9145', 'b', 'e', 'b', '2967', '6933', 'e', 's', 'v', 'f', 'z', 'r']
Example Output: b, c, e, f, q, r, s, v, x, z

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: ['3865', '6389', '5269', 'n', '3115', '1321', 'g', 'o', '6113', '4499', '5983', 'q', 'o', '9785', '7157', '4189', '6963', '3415', 'd', '135', '441', 'd', 'b', 't', '383', 'c', 'r', '6053', 't', '4877', 'd', 'v', 'a', 'y', 'd', 'h', '1525', '9833', 'a', 'u', 'z', 'j']
Example Output:
a, b, c, d, g, h, j, n, o, q, r, t, u, v, y, z