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: ['q', '8149', '4087', '5183', 't', 'j', 'e', 'g', 'r', '2125', 'y', 'l', 'g', '3673', 's', 'r', 'e', 'v', '4259', 'v', '3477', '9353', '3639', 'v', 'n', 'e', 'z', '5071', 'x', '6287', 'e', 'e']

A: e, g, j, l, n, q, r, s, t, v, x, y, z
****
Q: ['333', 'b', '261', 'k', 'p', '7861']

A: b, k, p
****
Q: ['i', '6501', '7645', '3861', 't', 'y', 't', '115', 'o', 'g', 'd', 'd', 'z', 'i', 'q', '7745', '1627', 'y', 'o', 'e', 'e', '9811', '2799', '4967', '6549', 'o', '8655', '8441', 'z', '7299', 'r', '8901', '7235']

A:
d, e, g, i, o, q, r, t, y, z
****