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: ['q', 'o', '1205', '4429', '6301', 'e', '2857', '5075', '5121', 'p', 'b', '5801', 'a', 'm', 'j', 'p', '1279', '7011', 'x', '2557', 'k', 'v', 'b', 'u', 'w', 'n', '1689', 'o', '1583', 'w', '6403', 'p', '6397', 'e', '823', '5699', 'd', '3399', 'd', 'b']
Example Output: a, b, d, e, j, k, m, n, o, p, q, u, v, w, x

Example Input: ['x', 'b', '1467', 'y', '2101', 'y', 'm', '2745', 'z', '429', '7523', 'e', 'f']
Example Output: b, e, f, m, x, y, z

Example Input: ['1587', '9207', 'd', '9489', 'm', 'm', '6055', '1533', 'f', '3881', 'l', '1143', '5677', '3709', '8371', '8243', '203', 'i', '8743', 'x', 't', '6197', '1185', '7071', 'z', 'y', '7033', 'd']
Example Output:
d, f, i, l, m, t, x, y, z