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: ['1197', '305', 's', '1113', 'n', '2207', 'e', '227', '2833', '607', '3049', 'v', '4615', 'a', 'k', 'r', 's', '3571', 'f', '4215', 'f', '8985', '5559', '4111', 'u', '1433', '1943', '8831', 'w', 'x', 'o', '9023', 'u', 'y', 'p', 's', 'h', '8877', 'p', 'n', '8903', '5811']
Example Output: a, e, f, h, k, n, o, p, r, s, u, v, w, x, y

Example Input: ['5463', '5683', 'w', '4071', '3997', 'i', '9677', 'q', 'l', 'v', 'w', '5325', '197', 'g', 'g', '3227', '3477']
Example Output: g, i, l, q, v, w

Example Input: ['3719', '1551', 'f', '885', 'b', '5275', 'r', '7169', 'a', '6487', 'p', 'v', '7129', '3971', '427', 'x', '6595', '3059', '521', 'm', 'y', 'b', 'd', 'm', 'g', '6825', '973', '4785', '6915', 'q', '3579', '2751', 'o', '4123', '6495', 'v', '2031', '9497', 'x', '3187']
Example Output:
a, b, d, f, g, m, o, p, q, r, v, x, y