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]: ['r', 'j', '437', 'b', '5223', 'n', 'v', '437', 'd', '8285', 'k', 'j', 'r', 'p', 'n', 'e', 'n', 'j', 'o', '2651', 'j', '6365', 'q', 'q', '2159', 'g', '3641', '7727', 'c', '1197', 's', 't', 'n']
[A]: b, c, d, e, g, j, k, n, o, p, q, r, s, t, v


[Q]: ['7065', 'f', 'k', 'i', 'd', '8291', 'z', 'e', 'q', '5345', 'h', '3397', 's', '5355', 's', '9033', 'e', '5241', '5285', 'm', 'h', 'i', 'n', '6471', '3365', 'f', 'r', '6145', 't', '4869']
[A]: d, e, f, h, i, k, m, n, q, r, s, t, z


[Q]: ['1881', 'j', '651', '8803', '5869', '1005', 'k', '475', '6423', '761', '4417', '3421', 'j', 'q', 'a', 't', 'k', 'k', 'u', 'r', '4905', 'm', '5375', 'w', 'o', 't', '7095', 'j', 'h', 'o', '2097', '5905', 's', '61', '3231', 'd']
[A]:
a, d, h, j, k, m, o, q, r, s, t, u, w