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: ['e', 'n', 'y', 'f', 'l', 'h', '455', 'y', '591', 'm', '9041', 'b', 'b', 'o', '4215', '5009', 'o', 'a', '4369', 'u', '6911', '4825', 't', 'k', '6063', '2939']
Example Output: a, b, e, f, h, k, l, m, n, o, t, u, y

Example Input: ['w', '1081', 'n', '2073', 't', '6351', '5591', 'a', '113', 'w', 'q']
Example Output: a, n, q, t, w

Example Input: ['3995', 'n', 'z', '8389', '7857', '3005', 'i', 'e', '1117', 'z', '8251', 'r', 't']
Example Output:
e, i, n, r, t, z