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: ['p', 'v', '1099', 'y', '1313', 's', '181', 'u', 'e', 'u', '8435', '4125', '8661', 'c', '4605', 'f', 'x']
Example Output: c, e, f, p, s, u, v, x, y

Example Input: ['2047', '4403', 'g', '3017', '1627', 'v', 'r', '2237', '5513', 'o', 'v', '7229', '9801', 'j', '443', 'z', 'q', 'y', '7447', '1659', '3411', '55', '5153', '9921', '2195', '1075', '8187', 'p', 'x', 'h', 'y', 't', 'a', 'r', 'f']
Example Output: a, f, g, h, j, o, p, q, r, t, v, x, y, z

Example Input: ['e', '3769', '7375', '2033', 'x', 'a', '1601', '1195', 'm', 'g', 'o', '1095', 'm', 'b', '4145']
Example Output:
a, b, e, g, m, o, x