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: ['789', '3603', '3517', '5831', 'z', 'q', 'w', 'l', '5701', '9503', '8169', '1123', 'e', '529', 'j', 'z', 'l', 'o', '3705', 'o', '5131', '6063', 'c', 'j', '6275', '7701']
Example Output: c, e, j, l, o, q, w, z

Example Input: ['j', 'p', '8333', '8079', '4703', '7089', '8859', 'b', 'y', 'g', '7971', '6999', '2011', 'k', 'e', '9609', '4179', '3993', 'u', '3957', '6313', '4229', 'k', '5963', 'e', 'y', 'r', 'e', 'a', '2213', 'e', 'i', 'f', '7979', 'r', 'a', 'h', 'e', 'n']
Example Output: a, b, e, f, g, h, i, j, k, n, p, r, u, y

Example Input: ['w', 'h', 'q', '567', '7953', 'd', 'h', '7707', '821', 'f', '6475', 'n', '8629', '7499', 'r', 'w', 'x', 's', '4595', 'c', '4255', 'e', 'g', 't', 'v', '9747', 'e', 'q', 'k', '8389', 'k', '7847', '159', '6035', 'p', '9469', '3537', '3607', '8633']
Example Output:
c, d, e, f, g, h, k, n, p, q, r, s, t, v, w, x