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: ['1345', 'y', '7221', 'h', 'r', '3255', 'k', 'r', 'j', '8639', '467', 'f', 'k', 'n', 'k', 'j', 'l', 'w', '143', 'w', 'q', '5657', '589']
Example Output: f, h, j, k, l, n, q, r, w, y

Example Input: ['k', 'z', '303', 'a', 'f', 'q', 'i', '1475', '3453', 'd', 'w', '4037', 'z', 'h', 'k', '3547', '1561']
Example Output: a, d, f, h, i, k, q, w, z

Example Input: ['6545', '3893', '4533', '3963', '5315', '8251', 'c', 't', 'u', '9215', '6239', 'p', '6013', '6145', '5351', '3183', 'o', 'z', '4975', 'd', '6285', 'k', 'o', '7653', 'l']
Example Output:
c, d, k, l, o, p, t, u, z