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: ['4653', 'e', 'c', 'j', '6739', '3963', 'q', '4649', 'v', 's', 'j', '9757', '8075', '6253', '4365', 's', '9101', 'd', '6989', 't', '5687', '7389', '139', '4029', '5073', 'q', 'e', '2455', '1075', 'j', '1329', 'l', '4689', 't', 'z', '4179', 's', 'l', 'w', 'n', '6569', '8907', 'v', '605', 'y']

A: c, d, e, j, l, n, q, s, t, v, w, y, z
****
Q: ['r', 'n', '7583', '8697', '7927', 'l', '5003', '1363', 'p', 'e', 'q', '6227', '6915', '8619', '9011', 'n', '3063', '3799']

A: e, l, n, p, q, r
****
Q: ['6589', 't', 'u', '81', 'f', '2057', '3287', '2649', 'k', '323', 'd', '1893', 'i', '3043', 'b', '4185', '8051', '6941', 's', 'y', '4021', '9317', 'b', 'q', 'r', 'i', 'r', 'k', '2275', 'a', '3561', '9187', 'o', '959', '6341', '7439', 'h', 'a', '2091', 'o', 'z', 'p', '5769', '8713', 'u']

A:
a, b, d, f, h, i, k, o, p, q, r, s, t, u, y, z
****