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.

['7109', '1243', 'f', 'z', 'h', 'd', '6169', 'v', 'h', '3609', '3181', 'd', '3661', '7193', '7341', '9127', 'r', '1623', '5813', 's', 'd', '4011', '4983', 'n', '4195']
d, f, h, n, r, s, v, z

['3043', 'r', 'm', 'i', '2653', 'i', '1703', '1125', '6299', '4863', 'n', 'h']
h, i, m, n, r

['f', 'k', '1485', '1455', 'f', '3535', 'x', 'i', 'o', '4851', '8321', 'w', 'l', '4815', '4005', 'g', '2033', '2607', '7567', 'i', '5631', 'm', 't', '897', 'm', 'n', '8255', 'y', 'a', '7127', '1103', 's', 'r', 'l', 's', 't', '3861']

a, f, g, i, k, l, m, n, o, r, s, t, w, x, y