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: ['o', '369', 'z', '5721', 'w', 'v', '4973', '7773', 'k', '3071', '5103', '425', '4239', '7977', 'n', 'i', 'k', '8117', '9843', 'n', 'd', '1353', 'h', 'd', 'v', 'z', 'j', '8727', '6997', 'x', '767', '4331', 't']

A: d, h, i, j, k, n, o, t, v, w, x, z
****
Q: ['3583', 'd', '1481', 'w', 'l', '7261', '2933', 'n', '8725', 'g', '3441', 'r', '287', '7327', '5637', 'r', '5389', 'm', 'j', 'd', 'a', 'e', 'v', '7879', '1731', 'z', '43', 'q', 'p', '4315', 'p', '3651', 'o', 'l', 's', '9787', 'h', '6735']

A: a, d, e, g, h, j, l, m, n, o, p, q, r, s, v, w, z
****
Q: ['h', '4649', '8871', '6157', 'y', 'z', '9633', 'i', '3105', '4693', '9201', '8403', '7177', 'd', 'e', 'a', '2969', 'j', 'e', 'c', 'e', 'a', 'y', 'i', 'f', 'p', 'c', 'y', 'p', 'j', 'f', '8489', 'z']

A:
a, c, d, e, f, h, i, j, p, y, z
****