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: ['l', '7111', 'd', 'e', 'h', 'z', 'x', '5673', 'v', '8255', 'i', 'z', 'c', 'i', '4287', 'q', '9293', '9137', 'p', 'n', 'o', 'n', '7883', '6453', '7355', '8769', 'y', '9153']
Example Output: c, d, e, h, i, l, n, o, p, q, v, x, y, z

Example Input: ['1189', '7143', '993', '1513', '6449', '9749', '5963', '8159', 't', '3543', 'j', 'i', '4227', '1463', '6431', '4987', 'y', 'q', 'f', '321', 'm', 'r']
Example Output: f, i, j, m, q, r, t, y

Example Input: ['1121', 'f', '5957', 'v', 's', '299', '4885', 'h', '4689', 'a', 'e', 'y', 'p', 'i', '9093', 'g', '7227']
Example Output:
a, e, f, g, h, i, p, s, v, y