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: ['m', 'z', 'd', '4667', 'v', '2881', '887', 's', '9861', 'd', '8821', '125', 't', '4493', '6749', '2983', '309', '6033', 'i', '3421', 'j', '4001']
Example Output: d, i, j, m, s, t, v, z

Example Input: ['e', 'k', '7569', '6387', '4593', '2445', '345', '2905', 'h', '3119', '7001', 'x', 'a', '2943', '3635', 'l', 'q', 'z', 'g', '2657', '7849', 'i', '9413', 'm', 'e', '2951', 'd', '2963', 'b', 'u', 't', 'i', '1141', 'c', 'm', '8607', 's']
Example Output: a, b, c, d, e, g, h, i, k, l, m, q, s, t, u, x, z

Example Input: ['3645', 'k', 'o', 'a', 'q', '2059', '7685', '8329', 'l', 'w', '795', 'v', '955', '1149', '9523', '9179', '5457', '4017', 'n', '4601', '229', '8837', 'j', '4857', '55', 'v', 'h', 'e', '5631', '1963', '7811']
Example Output:
a, e, h, j, k, l, n, o, q, v, w