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: ['q', 'c', 'o', 'e', 'n', 'q', 'w', '9475', 'w', '863', 'r', '2219', '3483', '5035', '8209', '7957', 'b', '3735', '1423', 'l', '3409', '7639', 'd']
Example Output: b, c, d, e, l, n, o, q, r, w

Example Input: ['7595', '5303', '3985', 'n', 'w', 's', 'r', 'f', '8237', 'q', 'y', 'f', '3121', '2463', '4597', 'q', '6801', 'f', 'i', '8563', '3267', 'k', '6157', 'f']
Example Output: f, i, k, n, q, r, s, w, y

Example Input: ['8475', '5589', '5603', '1859', '3335', 't', 'y', 'o', '669', '6007', '3189', '8545', 'o', '9933', 'g', '3425', '9399', 'x', '3101', 'm', 'e', '3371']
Example Output:
e, g, m, o, t, x, y