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.

[EX Q]: ['i', '1191', '5581', '2527', 'g', '9795', '519', 'u', '8389', '9793', 'k', '5733', '7125', '7835', 'j', '855', 'd', 'd', '6555', '3211', 'l', 'o', 'b', '523', 'x', 'j', '1707', '4161', '7171', 'h', 'h', 'm', 'h', '2443', 'e', '649', '951', 'n', 'h']
[EX A]: b, d, e, g, h, i, j, k, l, m, n, o, u, x

[EX Q]: ['j', 'a', 'z', 'h', '4129', '4159', 'm', 'o', 'o', '1193', '2905', '3083', 'q', 't', 'm', 'o', '673', '7547', 'n', 'c', 'r', 't', '2897', '4959', 'z', '2377', 'y', '7977', 'u', 'b', 's', 'w', 'e', 'd', '8051']
[EX A]: a, b, c, d, e, h, j, m, n, o, q, r, s, t, u, w, y, z

[EX Q]: ['5621', '7815', '2865', '7401', '4697', 'z', 'w', 'e', '3119', '9951', '6709', 'o', 'y', '3823', 'y', '5635', '53', '8397', '7935', 'o', 'm', 'j', 's', '8565', '9209', 'e', '8951', '5651', '6733', 'u', '1427']
[EX A]:
e, j, m, o, s, u, w, y, z