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.

Input: Consider Input: ['1985', '729', '169', '1299', 'l', 'z', '6809', '3083', 'w', 'f', '1989', 'z', '889', 'x', 'r', '1601']

Output: f, l, r, w, x, z


Input: Consider Input: ['653', '1969', '6235', '6283', 'd', 'e', '465', 'e']

Output: d, e


Input: Consider Input: ['g', '271', 'e', '7213', '4217', 't', '9579', 'i', '8723', '4407', 'y', 'y', 'i', 'i', 'v', '1183', 'z', '7565']


Output: e, g, i, t, v, y, z