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]: ['h', 'u', 'y', '7677', '9441', '1769', 'v', '1433', 'l', '7739', 'a', '8305', 'n', 'a', '6711', '3161', 'e', 'u', '993', '2211', '4011', 'q', 'o']
[A]: a, e, h, l, n, o, q, u, v, y


[Q]: ['219', '2065', '4045', 'k', 'n', 's', 'z', '7239', '1043', 'r', '2333', 'q', 'k', 'b', '2013', 'g', '6925', '9835', 'a', '5377', 'k', '8005', 'p', '9753', 'm', '201', '2353', 'f', 'n', '89', 'q', 'p', '7847', 's', 'l', '3359', '2269', 'v', 'm', '8247', '9665', 'u', 'w']
[A]: a, b, f, g, k, l, m, n, p, q, r, s, u, v, w, z


[Q]: ['d', 's', 'm', 'l', '7983', 'j', 'w', '6365', 'i', 'p', '5061', '2113', '981', '939', '9531', 'u', 'l', '7241', 'w', 'w', 'o', '5349', 'u', 'z', 'o', 'r', '9851', '4621', '2863', 'c', '543', 'a', '2673', 'l', '4519', 's', 'm', 'z', '1663', 'a', '7683', 'h', '9183', '4391']
[A]:
a, c, d, h, i, j, l, m, o, p, r, s, u, w, z