Q: 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.
['2267', '3121', '8189', 'j', 'h', '9455', '4181', 'o', 'h', '2605', '2491', 'n', '9657', '6057', 'e', 't', '8725']
A:
e, h, j, n, o, t