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: ['d', 'm', 'k', '3513', '8241', '5541', 'm', 's', '1993', '6163', '2753', 'd', 'b', 'm', 'i', '7647', '8631', '9119', '2165', 'x', '3911', '2769', '1673', '7195', 't', 'w', '5555', 'o', '3265']
Example Output: b, d, i, k, m, o, s, t, w, x

Example Input: ['w', 'o', 'l', '1857', 's', 'q', 'j', 'e', '5945', 'g', 'l', '9563', 'e', 'u', '7633', '7977', '4943', 'y', '5621', 'f', '1653', 'c', 'l', '2843', '2125', '7731', '5257', '5667', 'b', 'b', '5765', 'a', 't', '8163', '9785', '5385']
Example Output: a, b, c, e, f, g, j, l, o, q, s, t, u, w, y

Example Input: ['z', '3571', '9147', 'u', 's', 'o', '8069', 'u', 'h', 'z', 'h', 'k', 'g', 'm', 's', 'l', 'y', 'q', 'z', '6609', 'q', 'w', '5955', 'n', '477', 'f', '3467', '3785', '6211', '6237', 'w', 'h', '6623', '1377', 'q', 'p']
Example Output:
f, g, h, k, l, m, n, o, p, q, s, u, w, y, z