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: ['5489', 'f', '6833', 's', 'c', '6575', 'w', '2957', '8465', 'v', 'h', '2119', '7731', 'e', '5367', 'e', '3357', 'p', '7565', 'n', 'x', 'n', 'f', '1075', '5941', '6505', 'j', 'p', '2853', 'l', 'q', '4727', 's']
Example Output: c, e, f, h, j, l, n, p, q, s, v, w, x

Example Input: ['2313', '2073', 'd', 'e', 'o', '793', '4999', 'f', 'c', '4473', '4519', 'u', 'n', 'k', '69', '475', 'a', 'j', 'q', 'x', '5869', '9523', 'z', 'v', '9265', '5989', 'p', 'm', 'g', 'y', 'b']
Example Output: a, b, c, d, e, f, g, j, k, m, n, o, p, q, u, v, x, y, z

Example Input: ['1287', 'j', 'o', '9111', 'u', '6347', 'h', 'u', '7275', 'v', 'i', 'h', '3707', '1887', 'e', '1533', '9765', 'm', '6543', 'x', '5863', '8973', 'x', 'g', '2959', '1315', '5083', '4143', '2173', '2321']
Example Output:
e, g, h, i, j, m, o, u, v, x