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.

['4653', 'e', 'c', 'j', '6739', '3963', 'q', '4649', 'v', 's', 'j', '9757', '8075', '6253', '4365', 's', '9101', 'd', '6989', 't', '5687', '7389', '139', '4029', '5073', 'q', 'e', '2455', '1075', 'j', '1329', 'l', '4689', 't', 'z', '4179', 's', 'l', 'w', 'n', '6569', '8907', 'v', '605', 'y']
c, d, e, j, l, n, q, s, t, v, w, y, z

['i', 'x', 'n', 'w', '8915', 'd', 'd', 'd', '6025', '7861']
d, i, n, w, x

['g', 'w', '3455', '9615', '2015', '8131', '3367', 'w', '4503', 'v', 'v', '2343', '6833', '3209', '9595', 'r', '513', '8705', '2233', '8275', 'a', 'y', 'l', '5499', '3219', '3369', 's', 'l', 'h', '301', '3339', '2457']

a, g, h, l, r, s, v, w, y