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: ['e', 'c', '4241', '2685', 'o', '9859', 'z', '2647', 'b', 'c', 'y', '1985', '5985', '5709', '6655', 'q', 'z', '9933', '6817', '6477', '1837', 'x', 'p', '9251', '3787', 'v', '5741', 'e', 'p', '493', '5949', '5519', 'v', 'g', '1403', 'z', 'h', 'z']

A: b, c, e, g, h, o, p, q, v, x, y, z
****
Q: ['1931', 'c', 's', '8767', 'z', '8977', '9249', '365', 'p', '7187', 'p', '961', 'k', 'k', '423', '5999', '4697', '6251', '6441', '1821', 's', 's', 'f', '5365', 'z', '5113', 'y', 'k', 'i', '5627', 'u', 'w', '4103', '8035', '7105', 'o', 'n', 's', 'y']

A: c, f, i, k, n, o, p, s, u, w, y, z
****
Q: ['5531', '635', '6901', '4231', 'm', 'y', '5589', 'd', '4915', 'w', '5003', 'k', '2799', '6781', 'd', '6819', '6575', 'e', '7117', 'u', 'n', 'e', 'g', '971', '6903', 'd', '5295', 'd', '8619', 'h', '1847', 'l', 'a', 'l', 'l']

A:
a, d, e, g, h, k, l, m, n, u, w, y
****