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.

[EX Q]: ['3019', 'g', 'q', 'u', '611', 'z', '3671', '8119', '1679', 'h', '2631', '655', 'k', '2837', 'e', 'f', 'e', 'f']
[EX A]: e, f, g, h, k, q, u, z

[EX Q]: ['t', 't', 'p', '3245', 'x', 'g', 'i', 'u', '2599', '8613', 't', 'v', 'p', '5635', 'y', '9567', '5193', '8617', 'q', 'f']
[EX A]: f, g, i, p, q, t, u, v, x, y

[EX Q]: ['z', 'w', 'd', 'x', 'h', 'n', 'n', 'i', 'd', 'w', '9045', 'j', 'i', 'j', '3567', 'f', '9347', '9775', 'i', '2513', 'j', 'x', 'z']
[EX A]:
d, f, h, i, j, n, w, x, z