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: ['k', '6595', '1595', 'v', 'h', 'b', '8815', '6681', 'j', '7581', 'p', '9095', '5453', 'r', 'y', '7755', 'x', '1853', 'k', 'q', 'u', 'j', 'q', '9651', 'o']
Example Output: b, h, j, k, o, p, q, r, u, v, x, y

Example Input: ['e', 'z', '5199', 'x']
Example Output: e, x, z

Example Input: ['1371', 'p', '4663', '155', '6975', '5323', '2185', 'd', '8581', '9857', 'i', '6381', 'g', '8207', 'v', '3463', 'x', 'z', '6715', '1839', '1647', '6757', 's', '6539', '367', 'k', 'k', '6077', 'y', 'n', '4363', '3251', '6025', '9057']
Example Output:
d, g, i, k, n, p, s, v, x, y, z