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.
Q: ['2349', '8593', '1093', '4191', 'x', '987', '8223', '5649', '2057', 'f', 'f', 'w', 'k', 'h', '7035', 'w', 'v', '2675', 'v', 'j', '1037', '3753', '8601']
A:
f, h, j, k, v, w, x