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: ['5011', 'l', '925', 'e', 'b', '3077', 'm', '4541', '781']

A: b, e, l, m
****
Q: ['7627', '573', '2789', '721', '7223', '5977', '4315', '4199', '689', 'k', 'm', 'k', 'e', 'o', '8649', 'l', 'z', 'w', '8241', 't', 'm', 'e']

A:
e, k, l, m, o, t, w, z
****