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: ['4417', 'x', '4641', '885', '8485', 'd', '7057', '8519', 'm', 'i', 'l', '4627', '3069', 'v', '5011', 'u', '6673', 'h', '4541', 'j', '2337', '8175', '4797', 'f', '9109', 'q', 'q']

A: d, f, h, i, j, l, m, q, u, v, x
****
Q: ['7065', 'q', 't', '3177', '9035', 'i', 'l', 'd', '8961', '1183', '6507', 'u', 'c', 't', '2467', '7659', 'e', '8963', 'j', 'g', 'p', '6779', '7115']

A: c, d, e, g, i, j, l, p, q, t, u
****
Q: ['h', 'w', '2383', 'u', '5445', 'n', '6981', '765', 'd', '5645', 'a', 'j', '741', '2871', '7143', 'b', 'k', '705', '6387', 'n']

A:
a, b, d, h, j, k, n, u, w
****