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: ['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: ['p', 'd', 'w', 'i', 'm', '7493', '1085', 'h', '2113', '7637', 'j', '8155', '759', '4901', 'j', '7345', 'e', 'b', 'a', 'i', 'v', 'j', '9575', '8867', 'p', '8989', 'b', 'x', '6959', 't', 'n', 'v', '3181', '785', '2877', '6569', '9189', '4423', 'a', '1549']
Example Output:
a, b, d, e, h, i, j, m, n, p, t, v, w, x