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: ['j', 's', 'z', 'v', '5401', 'u', '8859', 'i', 'l', 'a', 'p', 'v', 'v', 'o', '3969', '4091', 'y', '6827', '1799', '5163', 'd', 'w', '4795', '5167', 'x', 'q', '2903', '1171', '5279', '449', '7901', 'u']

A: a, d, i, j, l, o, p, q, s, u, v, w, x, y, z
****
Q: ['f', 'j', '9195', '3155', '2855', '5333', '5263', '9279', '687', 'e', '3055', '7233', '13', 'j', 'p', 'i', '8327', 'm', 'h', '3977', 'h', '7997', 'a', 'h', '4661', 'x', '8237', 'a', '5009', 'o', 'p', 'z', '2293', 'q', 'p', '5469', 'k', 'q', 'b', 'n', '1967', '4991']

A: a, b, e, f, h, i, j, k, m, n, o, p, q, x, z
****
Q: ['6045', 'b', 'h', 'i', 'l', '6465', 'u', '2389', 'p', '2069', 'a', '5149', '3095', '5935', 'f', '4745', '7337', '5203', 'g', '3427', '7975', '3219', 'l', '7807', '2753', 'f', 'j', 'v', '17', 'i', '1111', '4957', '7077', 'k', 'r', 'x', 'l', 'y', 'y', 'a', 'k', '5069', '1501']

A:
a, b, f, g, h, i, j, k, l, p, r, u, v, x, y
****