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.

[Q]: ['j', 'p', '8333', '8079', '4703', '7089', '8859', 'b', 'y', 'g', '7971', '6999', '2011', 'k', 'e', '9609', '4179', '3993', 'u', '3957', '6313', '4229', 'k', '5963', 'e', 'y', 'r', 'e', 'a', '2213', 'e', 'i', 'f', '7979', 'r', 'a', 'h', 'e', 'n']
[A]: a, b, e, f, g, h, i, j, k, n, p, r, u, y


[Q]: ['5431', 'o', 'u', 'l', 'f', 'd', 'r', '1479', '9357', 's', 'v', '6399', 'b', '7937', 't', '8497', 'r', '131', 'h', 'c', 'v', '8879', 'k', 'r', '4687', 'l', '1065', 'r', 'w', 'l', '3305', '461', 'q', 'h', 'b', 'e', 'e', 'w', '5999']
[A]: b, c, d, e, f, h, k, l, o, q, r, s, t, u, v, w


[Q]: ['161', 'l', 'e', '9387', '3957', '7929', '6549', '3275', 'k', 'u', '3389', 'f', '9229', 'j', 'p', '4517', '7205', 'e', '5835', 'a', '3135', '3283', '6649', 'h', 'l', '6565', 't', 'n', '2251', 'c', '5789', '4049', '2565', 'o', 'c', '3613', 'l']
[A]:
a, c, e, f, h, j, k, l, n, o, p, t, u