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.

['6585', 'i', 'p', '5623', '3557', '8011', 'c', '6389', 'h', 'h', 'd', '1823', '5567', 'v', 'p', 'x', 'c', '2161', '3649', 'o', '6227', 'f', '9975', 'd', 'm', '2587', 'o', 't', 'k', '7637', 'm', 'l']
c, d, f, h, i, k, l, m, o, p, t, v, x

['o', '369', 'z', '5721', 'w', 'v', '4973', '7773', 'k', '3071', '5103', '425', '4239', '7977', 'n', 'i', 'k', '8117', '9843', 'n', 'd', '1353', 'h', 'd', 'v', 'z', 'j', '8727', '6997', 'x', '767', '4331', 't']
d, h, i, j, k, n, o, t, v, w, x, z

['m', 's', 'n', 'r', 'e', 'v', 'y', '9695', '9149', '8527', '9683', '859', '8065', '3291', '5863', 'i', 'b', '2047', '4025', 'i', '1709', 'a', '7417', 'p', 'q', 's', '9877', 'm', '5395']

a, b, e, i, m, n, p, q, r, s, v, y