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: ['s', 'w', 'c', '4137', 't', '2437', '349', 'h', '4539', 't', 'b', 'y', 'q', 't', '9087', 'c', '9489', '6285', '6247', '8353', 'n', 't', '8661', 'p', 'z', 'p', '773', 'w', 'q', '8081', 'r', 'u', 'z', 'k', 'a', 'b', '7513', '5549', '5325', '1101', 's', '6507', '3317']

A: a, b, c, h, k, n, p, q, r, s, t, u, w, y, z
****
Q: ['j', '6675', 'u', 's', '705', '8227', 'f', 'w', 'n']

A: f, j, n, s, u, w
****
Q: ['3885', 'y', '7713', 'y', '1725', 'h', 'v', '7615', 'g', '6439', '3987', 'e', 'y', '1065', 'j', 'q', 'u', 'j', '1757', 'j', 's', '5327', '479', 'k', '6869', 'p']

A:
e, g, h, j, k, p, q, s, u, v, y
****