Definition: 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: ['e', 'o', '3489', '9003', 'q', 'j', 'q', '2935', '4229', '9667']

e, j, o, q