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]: ['7441', '7967', '2011', '1383', 'i', '3623', 'b', 'y', 'e', '1593', 'r', 'a', 'd', 'b', '6159', '3931', '989', '435', 'o', 'y', 'j', 'w', '7669', 'y', '5781', 'u', '531', '7467', '3971', '8139', 'w', 'a', '5113', '9461', '8377', '7431', '6975', '6055', '7307', 'v']
[A]: a, b, d, e, i, j, o, r, u, v, w, y


[Q]: ['4031', 't', 'o', 'c', 'x', '3007', '8329', '6345', '1267', '1017', 'o', 'x', 'l', '4129', 'd', '1987', '487', 'o', 'g', 'j', 'v', 'x', '3983', 'f', 'g', '5759', 'k', 'i', 'o', 'b', 'n', '683', 'j', 'o', 't', '4361', 'u']
[A]: b, c, d, f, g, i, j, k, l, n, o, t, u, v, x


[Q]: ['y', 'q', 't', '4307', 'm', '4715', '757', 'l', 'y', '7819', '9367', 'x', '3853', '2533', '4125', '2547', '9573', '5263', '4091', '9037', 'h', 'd']
[A]:
d, h, l, m, q, t, x, y