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]: ['m', 'z', 'd', '4667', 'v', '2881', '887', 's', '9861', 'd', '8821', '125', 't', '4493', '6749', '2983', '309', '6033', 'i', '3421', 'j', '4001']
[A]: d, i, j, m, s, t, v, z


[Q]: ['e', 'n', 'y', 'f', 'l', 'h', '455', 'y', '591', 'm', '9041', 'b', 'b', 'o', '4215', '5009', 'o', 'a', '4369', 'u', '6911', '4825', 't', 'k', '6063', '2939']
[A]: a, b, e, f, h, k, l, m, n, o, t, u, y


[Q]: ['3529', 'a', 'c', 'n', 'b', '199', '9937', 'q', 'o', 'x', '2961', '8647', 'v', '8747', '8249', '281', '4871', 'd', 'y', '4455', '825', 'd', 'p', 'f', '9345', 'h', 'z', 'i']
[A]:
a, b, c, d, f, h, i, n, o, p, q, v, x, y, z