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]: ['x', 'o', '8161', 's', '3653', 'v', 'c', 'e', '5353', 'h', '9145', '333', 's', '7689', '8277', 'a', 'o', 'h', 'z', 'w', '9297', 'w', '9383', '8963', 'k', 'x', 's', 'w', 'h', 'j', '5737', 'o', '2247', '3723', '2043', '4615']
[EX A]: a, c, e, h, j, k, o, s, v, w, x, z

[EX Q]: ['a', 'i', '7725', '2483', 'e', 'j', '5337', 'b', '6835', '8231', 'm', 'v', 'a', '1475', 'n', '5823', 's', 'm', '7313', '2841', '2585', '4673', 'u', '2083', 'z', 'd', 'p', '2117', 'i', '587', 'i', 'a', '2527', '7967', '6567', 'n', '6145', 'r', 'f']
[EX A]: a, b, d, e, f, i, j, m, n, p, r, s, u, v, z

[EX Q]: ['1217', 'u', '7181', '5271', '3403', '2681', '49', 'l', '6237', 'o', '3229', 'e', '7235', '4513', '2089', 'h', '6045', 'd', 'h', 'h', '1633', '2091', '5455', 'w', 'f', 'u', '1667', 'i', 'b', 'w', '1351', '3155', '8255', 'z', '7329', 'h', 'z', '1979']
[EX A]:
b, d, e, f, h, i, l, o, u, w, z