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: ['3223', 'h', 'w', 'f', 'y', '1667', '8843', '8759', '9203', '3305', '3549', '5507', '6251', 't', '8319', '9121', '6643', 'u', '4273', '4429', '7543', '7909', '789', '9183', '5729', 'd', '7063', 'b', '6677', 'w', 'x', 'x', 'z', '769', 'p', 'd', 'h']

A: b, d, f, h, p, t, u, w, x, y, z
****
Q: ['t', 'r', '2959', '2517', 'a', '9959', '729', '511', 'y', 'r', '465', 'c', '687', 'm', 'b', 'm', '3449', '9713', 'g', '8275', '8823', 'a', 'z', 'w', '2185', '6283', '8457', '8137', '7163', '8329']

A: a, b, c, g, m, r, t, w, y, z
****
Q: ['d', '5505', 'b', 'y', '8791', 'r', '6603', '1525', 'i', '7205', 'i', '4585', '6575', '1873', '6215', 'i', '9523', 'n', 'r', 'e', '4169', '4451', 'i', '4031', '1519', 'a', 'r', '6771', 'h', 'u', 'v', '4695', 'e', 'q', 'l', '7909', '2511', 'o', 't']

A:
a, b, d, e, h, i, l, n, o, q, r, t, u, v, y
****