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: ['6597', '7889', 'x', 'v', 'm', 'j', 'j', 'w', 'v', '177', 'x', '8353', '5897']

Output: j, m, v, w, x


Input: Consider Input: ['4213', '3595', '7937', 'y', '5723', 'v', 'b', '7007']

Output: b, v, y


Input: Consider Input: ['c', '8155', '8571', 'w', '5967', '6039', '3305', '4209', '227', 'q', '8197', '2695', '857', 'g', '1545', '8789', 'v', '7207', 'e', 'b', '6905', '4663', 'g', '4557']


Output: b, c, e, g, q, v, w