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: ['2047', '4403', 'g', '3017', '1627', 'v', 'r', '2237', '5513', 'o', 'v', '7229', '9801', 'j', '443', 'z', 'q', 'y', '7447', '1659', '3411', '55', '5153', '9921', '2195', '1075', '8187', 'p', 'x', 'h', 'y', 't', 'a', 'r', 'f']

A: a, f, g, h, j, o, p, q, r, t, v, x, y, z
****
Q: ['j', 's', 'z', 'v', '5401', 'u', '8859', 'i', 'l', 'a', 'p', 'v', 'v', 'o', '3969', '4091', 'y', '6827', '1799', '5163', 'd', 'w', '4795', '5167', 'x', 'q', '2903', '1171', '5279', '449', '7901', 'u']

A: a, d, i, j, l, o, p, q, s, u, v, w, x, y, z
****
Q: ['6331', '3875', 'l', '9815', 'm', '1979', 'l', 'z', '4591', 'm', 'p', 'k', '1987', '23', 'a', 'i', '3445', 'p', '9641', 'y', '6033', '9919', 'u', 'i', '9677', '3539', '7367', '1135', '8263', '4205', 'n', 'i', '5149', 'e']

A:
a, e, i, k, l, m, n, p, u, y, z
****
