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.

Q: ['d', 'm', 'k', '3513', '8241', '5541', 'm', 's', '1993', '6163', '2753', 'd', 'b', 'm', 'i', '7647', '8631', '9119', '2165', 'x', '3911', '2769', '1673', '7195', 't', 'w', '5555', 'o', '3265']

A: b, d, i, k, m, o, s, t, w, x
****
Q: ['i', 's', 'f', 'i', '2293', '245', '4983', 'h', 'h', '6203', '8703', '1613', 'h', 'o', '3635', '8069', '2829', '1939', 'u', 'm', '5305', 'n', 'k', '9367', 'u']

A: f, h, i, k, m, n, o, s, u
****
Q: ['1919', '7691', '5763', 'j', '7701', '6293', '8583', '6677', 'r', 'i', '6567', '1601', '5857', '6323', '7949', 'f', '7331', 'w', 'm', '8161', 'a', 'y', '1979', 'i', 'x', 'l', '6971', 'n', 'x', 'm', '9485', 'n', '6357', 'a', '8975', '5495', '5033', '5457']

A:
a, f, i, j, l, m, n, r, w, x, y
****