Detailed Instructions: 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.
Problem:['u', 'r', 'i', 'y', 'u', '8607', '8379', 'y', 'f', '4965', '5963', 'q', 'n', '9969', '6309', '6107', 'l', '3131', 'h', '6591', '1797', '5383', 'w', '7443', 'j', 'l', '2119', '1523', '9051', '4113', 'y', '825', '283', '8017', 'i', 'p', 'm', 'b', 'q', '7279', 'm', '2167', 'y', 'm']
Solution:
b, f, h, i, j, l, m, n, p, q, r, u, w, y