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: ['c', 'h', '8655', 'r', '7531', 's', 'r', 'w', 'e', 's', 'p', '1709', '5447', 'b', '5855', 'w', 'f', 'i', '7809', 'q', '1975', 'z', '4037', 'k', 'l', 'z', 'g', '9739', '8801', '3405', '6549', '4561', 'd', '1669']

A: b, c, d, e, f, g, h, i, k, l, p, q, r, s, w, z
****
Q: ['x', '4283', 'n', 'b', 'g', 'p', '8305', '7781', '5907', 's', '1305', 'w', '8623', 'o', 'c', 'u', '1839', '2869', '7537', 'y', '2395', '5309', 'e', '4059', 'l', '6647', 'p', '9717', 'y', 'y', '3769', '2527', '2981', '5255', '4063', 'j', '4843', 'j', '9355', 'z']

A: b, c, e, g, j, l, n, o, p, s, u, w, x, y, z
****
Q: ['y', '5645', '943', 't', 'c', '8899', 'k', 'n', '9907', '6767', '5511', 'b', 'p', '8817', '4167', 'x', '3013', 'o', 'p']

A:
b, c, k, n, o, p, t, x, y
****