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: ['n', 'h', 'j', '5945', '8511', 'y', '7739', '4717', '2483', 'p', '9545', '7647', '9863', '5591', '5393', 'i', '9225', '589', '1497', 'j', 'm', '2397', 'a', 'd']
Example Output: a, d, h, i, j, m, n, p, y

Example Input: ['d', '6003', 'k', '1987', '1877', 'a', '2615', 'n', 's', 'f', 'b', 'm', '1149', '8293', '5803', 'e', '2697', '5917', 'p', '6035', '2385', 'i', 'u', 'm', '9565', '4523', 'b', 'v', '2577', '9725', '6093', '6203', '4197', '8477', 'o', 'd', '3637', '9827', '5523', '7189', 'j', '8893', 'h', 'q']
Example Output: a, b, d, e, f, h, i, j, k, m, n, o, p, q, s, u, v

Example Input: ['n', 'x', '4541', '8433', '3191', '4327', '5889', 'd', 'p', 'i', '5115', '1023', '6069', 'u', 'i', '191', 'm', 'v', 'h', '7111', 'e', '3135', '7753', 'z', 'u', 'd']
Example Output:
d, e, h, i, m, n, p, u, v, x, z