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]: ['5859', 'x', 'z', 'v', 'l', 'z', 'g', 't', 'x', '341', '7023', '4937', 'b', 'n', 'y', 't', 's', '1369', '4461', 'f', '1315', 'l', '5221', '6583', 'h', 'j', 't']
[A]: b, f, g, h, j, l, n, s, t, v, x, y, z


[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]: ['h', 's', '4923', 'm', '1277', 'a', 'w', 'z', 'q', 'c', 'y', '5021', 'e', '5933', 'i', '7419', 'b', 'y', 'b', 'i']
[A]:
a, b, c, e, h, i, m, q, s, w, y, z