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: ['8005', 'q', 'w', 'a', 'f', 'o', '6017', '7591', 'm', 'p', 'z', 'q', 'u', 'o', 'd', '6043', 'f', '3575', 'r', '2885', 'o', '3141', '621', '2375', 't', '5397', 'h', 'b', 'i', '3785', '1551', 'i', '8879', 'g', '5237', '7111', '2057', '1743', '9895', '2613', 'i', 'z', '677']

A: a, b, d, f, g, h, i, m, o, p, q, r, t, u, w, z
****
Q: ['j', '8797', 'i', '5443', 'i', 'f', '7593', 'u', 'h', '3251', 'l', '681', 'y', 'n', 'r', '1699', '1379', '8987', '6955', 'x', 'p', 'x', '553', 'q', '5679', 'q', 'w', '9007', 'r', '8945', '7351', 'a', 'v', 'k', '1309', 'v', 'i', '4161', 'a', 'q', '2919', '6917', '6845']

A: a, f, h, i, j, k, l, n, p, q, r, u, v, w, x, y
****
Q: ['m', 'u', 'g', 'g', '9889', 'p', '8471', '8907', 'm', '231', 'l', 'b', '2369', '8931', '1435', 'y', '2397', '1999', 't', '9369', 'o', '7461', 'j', '4433', '2875', 'a', '5327', '533', '4491', 'c', 'q', '8327', 'h', '8567', '4027', 'd', '9939', '2691', '4761', '1159', '6441', 's', 'k']

A:
a, b, c, d, g, h, j, k, l, m, o, p, q, s, t, u, y
****