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: ['h', 'g', 'j', 'i', 'y', '7799', 'y', 'e', 'y', 'e', '6757', '3349', '1213', '191', 'd', '2149', '849', '8325', 'b', '6087', 'w', '7211', '7801']
Example Output: b, d, e, g, h, i, j, w, y

Example Input: ['7595', '5303', '3985', 'n', 'w', 's', 'r', 'f', '8237', 'q', 'y', 'f', '3121', '2463', '4597', 'q', '6801', 'f', 'i', '8563', '3267', 'k', '6157', 'f']
Example Output: f, i, k, n, q, r, s, w, y

Example Input: ['p', 'i', 'a', 'h', 's', '8437', '1307', 's', 'm', '3333', '9095', 's', '5159', 'p', 't', '9545', 'b', 'p', '1415', 's', '3725', '3453', 'j', 'w', 's', 'c', '9867', '1683', '7057', 'a', '6621', '21', '5267', 'z', 's', '5869', 'd', 'm', 'm', 'm', '6913', '1411', 'z']
Example Output:
a, b, c, d, h, i, j, m, p, s, t, w, z