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: ['i', 'x', 'n', 'w', '8915', 'd', 'd', 'd', '6025', '7861']
Example Output: d, i, n, w, x

Example Input: ['k', '8917', '3773', '6723', 'r', 'z', '3265', 'o', 'f', 'q', '9343', 'f', '1925', 'u', 'b', 'o', '5275', 'b', 'n', 'd', 'j', '4825']
Example Output: b, d, f, j, k, n, o, q, r, u, z

Example Input: ['o', 'w', '1007', '3905', 'a', 'v', 'n', 'w', '6455', '6107', 'l', '9067', '6051', '9401', 'e', '827', '8445', '9735', 'o', 'a', 'b', 'w', '2829', '1307', 'q', 'w', '9385']
Example Output:
a, b, e, l, n, o, q, v, w