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', 'v', 'f', 'x', 'k', 'f', 'j', '6245', '6289', 'd', '6909', '8701', 'm', '3277', 'f', 'j', 'j', '9227', '8663', '5771', 'j', 'n', 'u', '7837', 's', '2539', '6363', 'g', 'a', '1009', 'v', '1483', 'x', 'i']

A: a, d, f, g, i, j, k, m, n, s, u, v, x, y
****
Q: ['4009', 'y', '9077', 'p', 'q', '6711', '6443', '5491']

A: p, q, y
****
Q: ['z', 'n', 'x', '9327', 'o', '2445', '2265', 'v', '2413', 'c', '5407', 's', 'g', '153', '2813', '2845', 'd', '5853', '9669', '9485', '9561', 'i', 's', '6163', '2753', '3047', 'k', 'f', '6571', '8345', '8005', '7137', '7733', 'n', 't', '4817', 'r', 'g', '2001', '2945', '289', 'f']

A:
c, d, f, g, i, k, n, o, r, s, t, v, x, z
****