Given the task definition and input, reply with output. 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.

['8231', 'h', 'a', 's', '7335', 'd', '2359', '5065', 'w', 'q', 'r', '7883', '5669', 'a', 'y', 'u', '9909', 'k', 'p', 'h', '1823', '3589', '835', 'y', 'i', '6305', 'r', 'i', 'o', 'h', '1893', '1419', '6093', '4957', 'r', '6135', 'k', 'i', 'a', '3447', 'l', 'v']

a, d, h, i, k, l, o, p, q, r, s, u, v, w, y