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: ['u', '9249', 'u', 't', 'm', 'm', 'n', 'w', '8617', '2729', 'i', 'l', '2971', '3227', 'b', '9017', '4711', 'i', 't', 'r', 'a', 'a', '1701', '6397', '4535', '9167', '6039', '6111', '849', 'p', '8197', '2645', '5147', 'u', 'l', '7419', 'w', 'w', 'k', 'x', 'c', '3377', '4015', '1297', 'f']
Example Output: a, b, c, f, i, k, l, m, n, p, r, t, u, w, x

Example Input: ['7005', 't', '6323', '2771', 'p', '8891', 'y', '3927', 'y', 'o', '8773', 'r', '2497', '8819', '6271', '9861', '8767', 'k', 'p', '701', 'j', 'b', '6257', 'i', '7051', '2415', '6285', 'z', 'y', 'g', 's', '5807', 'c', 'a', 'z', 'b', '6061', 'a', '4517']
Example Output:
a, b, c, g, i, j, k, o, p, r, s, t, y, z