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: ['i', '9575', '8995', 'm', 'o', '3015', '4005', '6909', '7195', '3361', 'j', '5253', '9523', '8879', '5861', 'e', 'y', 'e', '1525', 'i', '807', '8469', '3333', '4017', '2237', '3387', 'o', '643', 'p', '7129', '6243', 'y', '4913', 'z', 'f', '6909', 'f', '4347', '7227', 'o', 's', '9909', '8611']
Example Output: e, f, i, j, m, o, p, s, y, z

Example Input: ['6175', '9441', '7127', '5979', 's', '1367', 'e', 'm', '7083', '1787', '8375', '2851', '3475', 'r', '697', 'g', 'z', 'm', '4207', 'c', '7971', 'z', '9339', 'd', 's', '3507', '9003', 'i', 'y', 'w', 'j', 'i']
Example Output: c, d, e, g, i, j, m, r, s, w, y, z

Example Input: ['2659', 'r', 's', 'v', 'c', '5155', '9313', 't', 'l', '9023', '5127', 'p', '8755', '7139', '9739', 'o', '9715', 'i', '8601', '9753', 'e', 'v', 'q', '5727', '515', 'q', '7557', '8001', '7135', 'h', '6687', 'n', 'c', 'u', '4413', 'h', 'k', 'w', 'w', '3809', '9367', '8245', '2337', 'r']
Example Output:
c, e, h, i, k, l, n, o, p, q, r, s, t, u, v, w