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.

Q: ['2943', 'k', '8519', '9103', 'j', '2461', '1049', '2211', '8761', 'l', 'e', '8939', '6013', 'r', '9089', '5781', '5383', '5495', '6699', '7307', '2733', '933', '9865', 'g', '6471', '3179', 'm', '8231', 't', 'e', 'u', '9909', 'g', 'g', '9431', '6521', 'y', 'g', '1415', 'e']

A: e, g, j, k, l, m, r, t, u, y
****
Q: ['f', 'a', 'r', '4009', 'k', 'a', 'g', '7725', 'v', 'b', '6705', 'a', '6583', '3159', 'c', 'w', 'x', 'h', '7625', 'p', 'y', '5645', 'k', 'r', 'j', '4175', 'r', '3103', '8631', '5999', 'p', 'g', 'h']

A: a, b, c, f, g, h, j, k, p, r, v, w, x, y
****
Q: ['5235', 'v', 'p', '9803', '3609', '9035', '6979', 'q', 'u', 's', '3777', '6617', 'f', 'e', 's', 'j', 'w', '3585', '1877', '6803', '5419', '4285', 'u', 'k', 'b', '6463', 'v', '7115', 'c', 'a', 'q']

A:
a, b, c, e, f, j, k, p, q, s, u, v, w
****