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: ['f', 'w', 'y', 't', '5269', '9989', 'p', 'v', '6609', 'v', 'c', 'q', 'm', '6565', '189', 'm', '3617', 'b', '9147', '665', 'v', '5989', '1511', '3123', '6667', '4661', '185', 'b', '3405', 'b', '6027', 'n', '6973', '505', 'g', '815', '3439', '2069', '291', 'j', 'f', '1121', '8009', 'm', '8353']
Example Output: b, c, f, g, j, m, n, p, q, t, v, w, y

Example Input: ['653', '1969', '6235', '6283', 'd', 'e', '465', 'e']
Example Output: d, e

Example Input: ['g', '1401', '4661', '7407', 'o', '9379', '2593', 'l', 'i', 'u', '71', 'v', 'z', '5743', 'e', '9957', '5297']
Example Output:
e, g, i, l, o, u, v, z