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.

Input: Consider Input: ['4417', 'x', '4641', '885', '8485', 'd', '7057', '8519', 'm', 'i', 'l', '4627', '3069', 'v', '5011', 'u', '6673', 'h', '4541', 'j', '2337', '8175', '4797', 'f', '9109', 'q', 'q']

Output: d, f, h, i, j, l, m, q, u, v, x


Input: Consider Input: ['653', '1969', '6235', '6283', 'd', 'e', '465', 'e']

Output: d, e


Input: Consider Input: ['p', 'h', '8289', '2479', '7443', '9587']


Output: h, p