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: ['9403', '9881', '8391', 't', '1793', 'w', 'x', 'y', '6383', 'j', 'r', '5323', 'r', 'l', 'e', 'u', '7193', '2309', '837', 'z', 'w', 'n', '4427', '8269', '6333', 'a', 'p', '1933', '8497', '2665', '1349', '6807', '9009', 'b']

A: a, b, e, j, l, n, p, r, t, u, w, x, y, 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: ['k', 'o', 'w', 'a', '5071', 'w', 'f', 'c', 'm', 'g', '9725', 'p', '6027', 'i', '7563', '4665', '7865', '2419', 'z', '8067', '8577', 'k', '851', '5583', 'p']

A:
a, c, f, g, i, k, m, o, p, w, z
****