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: ['9271', '6393', '6005', 'x', '2301', '3999', 'p', 'z', 'j', '1033', '7555', 'r', 'r', 'y', '8917', '5939', '4031', 'e', '8095', 'g', '6095', 'a', '4133', '6471', '2129', '8021', '1093', 't', '8805', '545', 'k', '3249', 'l', '1561', '9909', 's', '1963', 'o']

A: a, e, g, j, k, l, o, p, r, s, t, x, y, z
****
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']

A: a, c, e, h, j, k, o, s, v, w, x, z
****
Q: ['y', 'p', 'o', 'e', '6323', '7623', 'k', 'j', 'g', '1371', 'x', 'z', '5871', '2011', '2767', 'q', 'k', '997', '9131', 'r', 'd', 'm', '7051', 'i', 'x', '437', '7349', '9245', 'g', 'k', 'k', 'p', '6743', '1875', 'd', '3993', 'v', '77']

A:
d, e, g, i, j, k, m, o, p, q, r, v, x, y, z
****