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: ['5089', '6113', 'v', 'l', '5529', 'q', '7499', 'e', 'r', 'c', '5999', '2619', 'a', '2523', '7697', 'j', 'c', '6537', '8313', '5623', '4225', '7677', 'q', 'a', '6559', 'y', 'b', 'm', '7645', '7019', 'r', 'i', '5225', '703', 'i', '6189', 'f', 't', '7553']

Output: a, b, c, e, f, i, j, l, m, q, r, t, v, y


Input: Consider Input: ['s', 'j', '6779', '1535', 'd', 'e', 'u', '3023', '241', '9115', 'h', '8003', '3755', 'q', 'm', '2725', 'x', 'y', 'n', 'm', 'j']

Output: d, e, h, j, m, n, q, s, u, x, y


Input: Consider Input: ['463', '8261', '2919', '8281', 'g', '775', 'z', '6291', '9207', 'i', '6195', '8229', '2189', '4151', 'g', '9889', 't', '9107', 'l']


Output: g, i, l, t, z