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]: ['2943', 'k', '8519', '9103', 'j', '2461', '1049', '2211', '8761', 'l', 'e', '8939', '6013', 'r', '9089', '5781', '5383', '5495', '6699', '7307', '2733', '933', '9865', 'g', '6471', '3179', 'm', '8231', 't', 'e', 'u', '9909', 'g', 'g', '9431', '6521', 'y', 'g', '1415', 'e']
[A]: e, g, j, k, l, m, r, t, u, y


[Q]: ['i', 'y', '8339', 'd', 'b', '7471', '6577', '9037', '4503', '6287', '1439', '8863', '9201', '2661', 'x', 'l', 'v', 'w', 'a', 'f', '8885', '519', '7631', 'g', '7203', '8605', '2429', '9165']
[A]: a, b, d, f, g, i, l, v, w, x, y


[Q]: ['s', '5211', '2055', '7985', 'a', 'e', 'u', '259', 'r', 'a', 'x', 'g', '2659', 'y', '5621', '153', '2453', '4103', '5605', '5273', 'a', 'v', '8329', '2811', '8285', 'p', '3979', 'k', '2933', '857', '4823', 'w', '5765', '9229', '8299', 'r', 'o', 'c']
[A]:
a, c, e, g, k, o, p, r, s, u, v, w, x, y