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.

['j', 'r', 'z', 'f', '1485', '2419', 't', 'd', '6023']
d, f, j, r, t, z

['g', '4165', 'n', 'w', 'n', 'e']
e, g, n, w

['l', 'q', 'y']

l, q, y