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: ['3035', 'f', 'k', 'e', '3023', 'p', '9667', '5277', '4757', '8433', 'g', '1399', '7721', 'n', 'p', '7469', '7581', '5679', 'g', 'q']
Example Output: e, f, g, k, n, p, q

Example Input: ['q', '8149', '4087', '5183', 't', 'j', 'e', 'g', 'r', '2125', 'y', 'l', 'g', '3673', 's', 'r', 'e', 'v', '4259', 'v', '3477', '9353', '3639', 'v', 'n', 'e', 'z', '5071', 'x', '6287', 'e', 'e']
Example Output: e, g, j, l, n, q, r, s, t, v, x, y, z

Example Input: ['2695', '3235', 'c', 'w', '9953', '2401', 'k', '5595', 'w', '495', '4257', 'm', 'h', '5393', '3409', 'b', '9799', '1557', 'c', 't', '9181', '6517', '2103', 'x', '5961', '6399', '6063', 't', 'm']
Example Output:
b, c, h, k, m, t, w, x