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: ['4945', 'i', 'h', 's', '8925', 'i', '3995', 'f', '813', '1823', '3475', 'q', '2463', '9487', 'c', 'c', 'n', 'y', 's', '6269', 'a', 'u', 'd', 'd', '9291', '3187', '545', '7929', 'd', '1007', '7579', '8421', '4033', 'v', 'c', 'e', 'n', 'j']

A: a, c, d, e, f, h, i, j, n, q, s, u, v, y
****
Q: ['9689', '9727', 't', 'd', '2103', 'c', 'n', '8553', '4559', '7815', 'u', 'l', 'c', 'e', 'u', 'n', '7207', '4875', '7699', 'h']

A: c, d, e, h, l, n, t, u
****
Q: ['i', 'j', 'm', '4411', '8899', '7951', '3419', '4645', '9429', 'z', '4253', '6905', '8467', 't', 'l', '7113', 'w', '837', 'v', 'q', '3323', '8341', 'l', '6539', 's', '7277', 'q', '3675', 'j', 'i', '9905', '4429', 't', '8237', 'o', '9383', '9519']

A:
i, j, l, m, o, q, s, t, v, w, z
****