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: ['f', '9027', 'z', '9601', 'w', '7747', '1135', 'j', '1871', 'd', 'u', 'f', 'd', 'x', 'k', '2009', 't', '4625', 'm', '1619', 'm', 'm', '3107', 'x', '3957', '2495', 'j', '201', 'a', '4635', 'r', '7407', 'b', 'r', 'z']

A: a, b, d, f, j, k, m, r, t, u, w, x, z
****
Q: ['7981', '9377', '6275', 'm', 'w', 'v', 'p', 'r', '1563', '8737', '3997', '2699', 'h', 'o', 'f', 'z', 'v', '1945', 'c', 'k', 'h', '4087', '3745', 's', 'o', '8373', '9597', '7941', 'x', 'p', 's', '6931', '9689', '5031']

A:
c, f, h, k, m, o, p, r, s, v, w, x, z
****