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.

['3035', 'f', 'k', 'e', '3023', 'p', '9667', '5277', '4757', '8433', 'g', '1399', '7721', 'n', 'p', '7469', '7581', '5679', 'g', 'q']
e, f, g, k, n, p, q

['w', 'o', 'l', '1857', 's', 'q', 'j', 'e', '5945', 'g', 'l', '9563', 'e', 'u', '7633', '7977', '4943', 'y', '5621', 'f', '1653', 'c', 'l', '2843', '2125', '7731', '5257', '5667', 'b', 'b', '5765', 'a', 't', '8163', '9785', '5385']
a, b, c, e, f, g, j, l, o, q, s, t, u, w, y

['v', '5221', '8125', 'n', '3807', '9587', '2323', 'm', '3907', '7975', '4711', '2175', '8933', '4495', 't', 'u', '1519', '5417', '7495', '5877', 'p', '399', '6577', 'i']

i, m, n, p, t, u, v