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: ['k', 'j', 'v', '5277', '8607', 'n', '1109', 'e', 'k', '6579', 'o', '2909', 'u', 't', '9685', '8443', '9257', '8071', 'y', 'b', 'h', '4767', 'a', 'j', '8455', 'b', '7733', '2553', 'e']
Example Output: a, b, e, h, j, k, n, o, t, u, v, y

Example Input: ['s', '2507', '3091', 'g', '7643', '2573', 'w', 'r', '1977', 'q', 'c', 'j', '1335', '9671', '7317', '567', '2041', '5777', 'w', 'm']
Example Output: c, g, j, m, q, r, s, w

Example Input: ['p', '2859', 't', '5369', 'g', 'n', 'b', '8401', '3249', 'd', 'v', 't', 'j', '3199', 'k', '5047', 'w', 'y', 'p', '1489', '5333', '4779', 'q', '3551', 'o', 'v', 's']
Example Output:
b, d, g, j, k, n, o, p, q, s, t, v, w, y