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: ['6411', 'x', 'i', '267', 'z', 'e', '5483', '8033', '3697', 'z', '4167', 'e', 'f', '7229', 'i', 't', '2197', 'g']
Example Output: e, f, g, i, t, x, z

Example Input: ['q', 'h', 'q', '7185', 'f', 'l', 'r', '3605', 'x', 'i', 'v', '8789', 'u', 'x', 'x', '8315', 'x', 't', 'h', 'o', '4943', '5827', '7677']
Example Output: f, h, i, l, o, q, r, t, u, v, x

Example Input: ['2601', 'g', '9995', 'p', '9251', '6767', '2605', 'p', 'q', 't', '6017', 'l', '8585', 'p', 'z', '8017', '6495', 'f', 'h', '6267', 's', 'j', '4601', 's', 's', '4763', 'd', 't', 'l', '129', '8731', 'o', 'w']
Example Output:
d, f, g, h, j, l, o, p, q, s, t, w, z