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]: ['o', 'h', 'z', 'n', 'e', 'y', 't', '4371', 'm', '1059', '4853', '8529', 'l']
[A]: e, h, l, m, n, o, t, y, z


[Q]: ['a', 'y', '7401', 'e', 'l', '4351', 'p', '5673', 'k', '333', 'o', 'd', 'e', 'j', 'e', '9569', '1795', 'r', 'z', '6059', '4399', '2927', 'n', '9387', '9317', 'b', 'c', 'e']
[A]: a, b, c, d, e, j, k, l, n, o, p, r, y, z


[Q]: ['2305', 'e', '6201', '3121', 'x', 'n', 'm', '9807', 'f', 'e', 's', '8043', '7085', 'u', '8707', '183', 'q', '4411', 'w', '5087', 'k', '9285', 't', '3919', 'b', '7009', '8999', 'h', 's', '3227', '9661', '7405', 'j', 'g', '4279']
[A]:
b, e, f, g, h, j, k, m, n, q, s, t, u, w, x