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: ['7109', '1243', 'f', 'z', 'h', 'd', '6169', 'v', 'h', '3609', '3181', 'd', '3661', '7193', '7341', '9127', 'r', '1623', '5813', 's', 'd', '4011', '4983', 'n', '4195']
Example Output: d, f, h, n, r, s, v, z

Example Input: ['n', 'y', '7087', '9539', 'x', 'i', 'w', '7237', '8613', 'k', '5999', '4179', 'o', 'm', '7485', '1955', 'w', '1451', 'h']
Example Output: h, i, k, m, n, o, w, x, y

Example Input: ['r', '5515', '1219', '8421', '1213', 'm', 'a', '6573', '9041', 'e', 't', '6257', 'x', 'i', 'l', 'p', '7225', '3205', 'r']
Example Output:
a, e, i, l, m, p, r, t, x