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: ['1197', '305', 's', '1113', 'n', '2207', 'e', '227', '2833', '607', '3049', 'v', '4615', 'a', 'k', 'r', 's', '3571', 'f', '4215', 'f', '8985', '5559', '4111', 'u', '1433', '1943', '8831', 'w', 'x', 'o', '9023', 'u', 'y', 'p', 's', 'h', '8877', 'p', 'n', '8903', '5811']

A: a, e, f, h, k, n, o, p, r, s, u, v, w, x, y
****
Q: ['4925', 'i', 'q', 'k', '7615', 'r', '7217', 'o', '8097', '9151']

A: i, k, o, q, r
****
Q: ['z', 't', '183', '6901', '9001', 'j', 'r', '7961', 'n', 't', 'g', 'e', 'j', '489', '8707', 'b', '5275', 'n', '4377', 'm', 'v', '9575', '427']

A:
b, e, g, j, m, n, r, t, v, z
****