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: ['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']

Output: d, f, h, n, r, s, v, z


Input: Consider Input: ['q', '8149', '4087', '5183', 't', 'j', 'e', 'g', 'r', '2125', 'y', 'l', 'g', '3673', 's', 'r', 'e', 'v', '4259', 'v', '3477', '9353', '3639', 'v', 'n', 'e', 'z', '5071', 'x', '6287', 'e', 'e']

Output: e, g, j, l, n, q, r, s, t, v, x, y, z


Input: Consider Input: ['u', '6511', 'q', 'c', 'h', 'z', '6025', '1085', 'l', '6129', '2297', '6437', '2139', '7853', 'v', '399', '8271', '561', '5417', 'k', 'q', '6603', 'v', 'r', 'r', 'y', '1577', '5063', 'g', '5953', '3541', '8313', 't', '4335', 't', '2375', '395', 'j', '6091', '4585', '9905', 'n', '8857', '3029']


Output: c, g, h, j, k, l, n, q, r, t, u, v, y, z