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.

['v', 'd', '3805', '8031', '3327', 'c', 'n', '6153', '2705', 'w', '5675', '6543', 'm', 'v', 'y', 'd', '2943', '4423', '515', '4501', 'y', '9377', 'j', 'i', 'f', '4749', 'o', 'r', '2605', 'm', '117', 'o', '9197', 't', 'l', '4145']
c, d, f, i, j, l, m, n, o, r, t, v, w, y

['d', '1625']
d

['5131', '5687', '4241', '9465', '1149', 'z', 'q', 's', 'l', 'v', '6097', '2539', '6891', 'a', '6955', 'g', '753', 'p', 'e', 'p', 'k', 'k', '1881', '1727', 'd', '5827', '711', '8749', '3847', '8675', 'q', '3935', 'r', '3943', '9243', '291', 'v', 'w']

a, d, e, g, k, l, p, q, r, s, v, w, z