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.

Example Input: ['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']
Example Output: b, d, f, h, p, t, u, w, x, y, z

Example Input: ['5553', 'f', '3881', '8867', 's', 'd', 'a', '375', '7889', '3949', '2905', 'w', 'q', 'q', 'd', '4203', 'i', '2601', 'y', 'p', 'k']
Example Output: a, d, f, i, k, p, q, s, w, y

Example Input: ['b', 'q', '5735', 's', 'z', '8117', '9099', 's', '8699', '9073', '6143', 'r', 'k', 'z', '1545', 'a', 'c', '6637', 'w', '6919', '5853', 'n', 'b', 'd', 'j', 'w', 'w', 'b', 'h', '4433', 'j', '9435', 'k', '7151', 's', '8459', '4525', 'l', 'a', 'q', '625', 'b', '7681', 'x', '8617']
Example Output:
a, b, c, d, h, j, k, l, n, q, r, s, w, x, z