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: ['x', 'o', '8161', 's', '3653', 'v', 'c', 'e', '5353', 'h', '9145', '333', 's', '7689', '8277', 'a', 'o', 'h', 'z', 'w', '9297', 'w', '9383', '8963', 'k', 'x', 's', 'w', 'h', 'j', '5737', 'o', '2247', '3723', '2043', '4615']
Example Output: a, c, e, h, j, k, o, s, v, w, x, z

Example Input: ['2293', 'p', '9787', '7241', '8689', 'u', '3141', 'h', 'c', 'b', 'f', 's', '319', 'c', 'p', '6909', 'p', 'f', '1717', 'd', '2285', 's']
Example Output: b, c, d, f, h, p, s, u

Example Input: ['797', 'y', 's', 'i', '4591', 'm', 'f', '6223', '2789', '2857', '6661', 'x', '3993', '8969', '8045', 'r', '9255', 'z', 's', 'r', 'i', 'a', '6635', '7089']
Example Output:
a, f, i, m, r, s, x, y, z