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: ['8887', '1199', 'r', '7209', 'k', '7567', '7239', 'k', '5123', 'w', '4523', 't', 'd', '5289', '5737', '485', 'w', 't', '7651', 'v', '7213', '7687', 'y', 'w', '7265', 'b', 'b', '3667', 'z', '9935', 'i', 'l', 'u', '6715', 'j', '9815', '8925', '7941', 'w', 'm', '3907', '621', '5523', '5849']
Example Output: b, d, i, j, k, l, m, r, t, u, v, w, y, z

Example Input: ['i', '1191', '5581', '2527', 'g', '9795', '519', 'u', '8389', '9793', 'k', '5733', '7125', '7835', 'j', '855', 'd', 'd', '6555', '3211', 'l', 'o', 'b', '523', 'x', 'j', '1707', '4161', '7171', 'h', 'h', 'm', 'h', '2443', 'e', '649', '951', 'n', 'h']
Example Output: b, d, e, g, h, i, j, k, l, m, n, o, u, x

Example Input: ['j', 't', '613', 'n', 'v', '1789', '647', '4861', '7107', '1619', '4927', 'f', '8817', '3121', '3849', 'o', 'v', '719', '3971', '7669', '4101', '1037', 's', '139', 'v', '7865', '8505', '187', '3973', '3133', '6571', '1007', 'e', '7519', '2951', '2631', '2063', 'u', 'g']
Example Output:
e, f, g, j, n, o, s, t, u, v