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: ['o', '1217', '449', 'n', 'e', 'o', 't', '9043', '1925', '5687', '7197', '7943', 'u', '5053', 'q', 'e', '89', 'l', 'h', '3083', '4295', 'o', 'n', '6309', '743', 'n', 'j', '2105', 's', '6845', 'p', 'p', '1355', '3757', 'v', 'f', '961', '4623', '4633', 'p', '4593', 'p', '7337', 'o', 'u']
Example Output: e, f, h, j, l, n, o, p, q, s, t, u, v

Example Input: ['8319', 'f', 'w', 'w', 'v', '6521', '4503', 'b', 's', 'b', '9651', 'k', '4635', '2195', '7537', '6839', 'i', 'd', 'b', '205', 'q', '7333', 'q', '5129', '4921', 's']
Example Output: b, d, f, i, k, q, s, v, w

Example Input: ['m', 'w', '8675', '3083', '5211', 'c', 'e', 'n', 'b', 's', 'k', 'p', '7337', '5885', 'y', '981', '3365', '6417', '9119', '1905', 'g', 'g', 'd', '3463', '2157', 'u', '2385', '2269', '2737']
Example Output:
b, c, d, e, g, k, m, n, p, s, u, w, y