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]: ['5089', '6113', 'v', 'l', '5529', 'q', '7499', 'e', 'r', 'c', '5999', '2619', 'a', '2523', '7697', 'j', 'c', '6537', '8313', '5623', '4225', '7677', 'q', 'a', '6559', 'y', 'b', 'm', '7645', '7019', 'r', 'i', '5225', '703', 'i', '6189', 'f', 't', '7553']
[A]: a, b, c, e, f, i, j, l, m, q, r, t, v, y


[Q]: ['o', 'm', '8015', '787', '4787', '1727', 'f', 'e', 'c']
[A]: c, e, f, m, o


[Q]: ['t', 's', '1343', 'h', '5213', '3665', '2155', 'd', 'm', '9407', '841', '9149', '6035', 'q', '1617', '2807', '6133', 'h', '3919', 'j', 't', 's', '4119', 'l', 'l', '1943', 'w', 'y', '4585']
[A]:
d, h, j, l, m, q, s, t, w, y