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]: ['z', '3219', '6399', '2357', '7597', '357', 'k', 'k', 'u', 'd', '6115', 'w', '2921', '8809']
[EX A]: d, k, u, w, z

[EX Q]: ['9385', '4021', 'y', '9629', 'u', '7623', 'd', '5155', 'x', '2605', '8893', 'l', 'p', 'a', 'm', '6699', 'i', '4503', '6623', 'm', 'l', '6115', 'p', 'w', '9691', '811', '4769', '2659', 'x', 'c', '6513', '5499', 's', 'q', 'f', 'v', 'z', 'w', 'z', '1361']
[EX A]: a, c, d, f, i, l, m, p, q, s, u, v, w, x, y, z

[EX Q]: ['9175', '4033', '5567', 'p', 'f', 's', 'p', 'h', '5165', '4711', '4661', 'l', 'k', 'f', '689', 'l', '3083', '1649', 'r', 'a', 'e', 'd', 'q', '103', 'h', 'y', '1315', '3889', 'v', '3371', 'i', '539', 'd', 'b', '5305', '89', '1713', '3411', '4665', 'd', '3883', 'k', 'r', 'p', '9859']
[EX A]:
a, b, d, e, f, h, i, k, l, p, q, r, s, v, y