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.

Example Input: ['j', '6675', 'u', 's', '705', '8227', 'f', 'w', 'n']
Example Output: f, j, n, s, u, w

Example Input: ['1197', '305', 's', '1113', 'n', '2207', 'e', '227', '2833', '607', '3049', 'v', '4615', 'a', 'k', 'r', 's', '3571', 'f', '4215', 'f', '8985', '5559', '4111', 'u', '1433', '1943', '8831', 'w', 'x', 'o', '9023', 'u', 'y', 'p', 's', 'h', '8877', 'p', 'n', '8903', '5811']
Example Output: a, e, f, h, k, n, o, p, r, s, u, v, w, x, y

Example Input: ['g', 'm', '1963', '7581', 'x', 'h', '2659', 'r', '6663', 'j', '4481', '121', 'n', 'y', 'l', 'y', '1227', 'w', 'j', 'd', 'w', 'g', 'c', 'i', '3759', '1637', '643', 'h', 'y', '2781', '7203', '8335', 'u', 'm', '4059', 'h', '6893', '2363']
Example Output:
c, d, g, h, i, j, l, m, n, r, u, w, x, y