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: ['6495', '2259', '8213', 'm', 'y', '3377', 'q', 'i', '1299', 's', 'w', '4331', 'h', '5459', '4059', '6637', '8069', '5367', '6025', 'l', 'v', '4503', 'd', 'x', 'w', '5067', '9019', 'd', '7919', '7299', 'v', '8957', 'v', '5341', '2617', '8169', 'n', 'y']
Example Output: d, h, i, l, m, n, q, s, v, w, x, y

Example Input: ['7417', '2597', '2633', '7721', 'v', 'l', 'p', '4389', 'l', '3965', '6279', 'm', 'v', 'o', 'd', 'o', 'h', 'd', 'r', 'e', '8993', '2711', 'o', 'q', '1399', 'i']
Example Output: d, e, h, i, l, m, o, p, q, r, v

Example Input: ['f', '5417', 'm', 'l', 'm', '7071', 'g', 'q', 'a', 'm', 'u', '7457', 'r', 'g', 'v', '307', '9643', 'x', '473', 'h', 'r', 's', 's', '8365', '6957', 'q', 'y', '7865', '8039', '9903', '4597']
Example Output:
a, f, g, h, l, m, q, r, s, u, v, x, y