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: ['5089', '6113', 'v', 'l', '5529', 'q', '7499', 'e', 'r', 'c', '5999', '2619', 'a', '2523', '7697', 'j', 'c', '6537', '8313', '5623', '4225', '7677', 'q', 'a', '6559', 'y', 'b', 'm', '7645', '7019', 'r', 'i', '5225', '703', 'i', '6189', 'f', 't', '7553']
Example Output: a, b, c, e, f, i, j, l, m, q, r, t, v, y

Example Input: ['w', '9437', 's', '9819', 'q', 'q', '4443', 'p', '377', '6777', 's', 'x', 'a', 'o', '9205', '9289', '7103', 'k', 'l', '9453', '9043', 'k', 'r', 'g']
Example Output: a, g, k, l, o, p, q, r, s, w, x

Example Input: ['a', 'x', 'm', '3671', 'g', 'h', '4583', '495', '7161', '8217', '5769', 'h', 's', '8737', 'p', 'g', 'n', '4411', '1945', 'k']
Example Output:
a, g, h, k, m, n, p, s, x