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]: ['f', 'w', 'y', 't', '5269', '9989', 'p', 'v', '6609', 'v', 'c', 'q', 'm', '6565', '189', 'm', '3617', 'b', '9147', '665', 'v', '5989', '1511', '3123', '6667', '4661', '185', 'b', '3405', 'b', '6027', 'n', '6973', '505', 'g', '815', '3439', '2069', '291', 'j', 'f', '1121', '8009', 'm', '8353']
[A]: b, c, f, g, j, m, n, p, q, t, v, w, y

[Q]: ['1063', 'f', 'm', 'i', 'x', 'i', 'd']
[A]: d, f, i, m, x

[Q]: ['j', '2295', '3635', 'd', '9721', '1481', 'w', '3561', 's', '111', '6121', 'g', '6005', '7669', '101', 'q', '5185', '6079', '525', '3947', '3277', '357', '3757', '5599', 't', '2095', 'm', 'n', '6905']
[A]:
d, g, j, m, n, q, s, t, w