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', '7573', '2067', 'n', '3671', '7969', '7889', '4893', '6501', 'l', 'y', '4331', 'a', 'e', '2081', '3863', 't', 'j', '7921', 's', '7203', '7797', 'f', '4279', '1299', '987', '5003', '9071', '9559', '6061', '1889', '2653', 'm', 'w', '665', '7343', '9763', 'r', '6343', '9393', '9289']
Example Output: a, e, f, j, l, m, n, r, s, t, w, y

Example Input: ['z', '5601', '5675', 'w', 's', 'z', '9213', '9563', '1699', 'p', 'g', 'm', 'c', '9279', '4481', 'p', 'n', '2389', 'c', '503', '1901', '8827', '1701', '1607', '5633', 'a', 'z', 'g', '3175', 's', 'l', 'l', '6811', '1821', '693', '8277', 'q', '8623', 'o']
Example Output: a, c, g, l, m, n, o, p, q, s, w, z

Example Input: ['v', '3379', '5349', 'x', '8293', 'r', 'l', 'm', 'f', '7183', '2597', '9911', 'z', 'l', 'z', 'e', 'x', 's', 't', 'k', 'o', '9329', 't', '8669', 'w', 't', 'o', 'e', '6801', 'r', '8053', '2105', '1787', '8311', 'o', 'k', '6005', '9263', 'l', '9049', 'x', '4865', 'z']
Example Output:
e, f, k, l, m, o, r, s, t, v, w, x, z