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: ['c', '6027', 'o', 'h', 'l', '7893', 'u', 'f', '7661', '4715', '1373', '4799', 'd', 'z', '411', '4753', 'd', '8241', '1589', '4173', '3921', 'j', 'o', '5067', '8879', 'e', 'm', '9543', '9625', '855', 'u', 'd', '5859', '4243', '5747', '5147', '7315', 'd', 'x', 'q', '7841', '7397', 'm']

A: c, d, e, f, h, j, l, m, o, q, u, x, z
****
Q: ['9833', '3383', 'h', '3545', '2899', 'y', 'p', 'q', '1901', '3317', '5641', 'v', 'c', 'u', '5521', 'e', '7997', '2439', '5573', '4119', 'k', '8291', '1009', '8253', '405', '233', 'p']

A: c, e, h, k, p, q, u, v, y
****
Q: ['w', '4975', '6041', '1243', '9417', 'v', 'f', 'q', 'q', '3315', '9641', 'p', 'p', 'i', '6157', 'l', 'p', 'g', '1071', '3397', 'o', '6057', 'd', '7915', '8209', '7967']

A:
d, f, g, i, l, o, p, q, v, w
****