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: ['1593', '8165', 'q', '6689', 'b', 'r', '373', 'g', '6505', '415', '495', 'j', 'j', 'f']

A: b, f, g, j, q, r
****
Q: ['h', 'l', 'e', '8047', 's', 'd', '9763', '841', '3635', '9577', '173', 'u', '5655', 'f', 'v', 'm', 'w', '8311', 'q', 'b', '9199', 'w', '3351', 'r', '9933', 'w']

A:
b, d, e, f, h, l, m, q, r, s, u, v, w
****