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: ['a', 'y', '7401', 'e', 'l', '4351', 'p', '5673', 'k', '333', 'o', 'd', 'e', 'j', 'e', '9569', '1795', 'r', 'z', '6059', '4399', '2927', 'n', '9387', '9317', 'b', 'c', 'e']

A: a, b, c, d, e, j, k, l, n, o, p, r, y, z
****
Q: ['j', '1733', 'p', '6741', '7933', '8943', '733', 'x', '1107', 'z', '1719', '7653', 'y', 'z', '6563', 'p', '4615', 'j', '4489', 'h', 'w', 'y', 'p', 'c', '7949', 'k', 'm', 'r', '9427', '7243', '9777', 'j', '323', '4095', 't']

A: c, h, j, k, m, p, r, t, w, x, y, z
****
Q: ['2739', 'y', '6679', 'd', '6261', 'r', '1507', '51', 't', 'd', 'c', '8199', 'z', 'o', '5215', '1135', '6175', 'i', '1797', '9737', '6913', '5123', 'z', '8347', '1195', '5627', '7741', 'u', '8925', '4511', '9379', 'j']

A:
c, d, i, j, o, r, t, u, y, z
****