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: ['1189', '7143', '993', '1513', '6449', '9749', '5963', '8159', 't', '3543', 'j', 'i', '4227', '1463', '6431', '4987', 'y', 'q', 'f', '321', 'm', 'r']

A: f, i, j, m, q, r, t, y
****
Q: ['7839', '849', '5651', '4275', 'e', '5453', 'h', '2099', '485', 'i', 'm', 'n', '6563', '5675', '4001', 'h', 'm', 'z', '3467', '4237', '5035', '5609', '8475', '5171', 'v', '3883', '8461', '8611', '4853', 'd']

A: d, e, h, i, m, n, v, z
****
Q: ['e', 't', 'y', '8083', '5619', 'z', 'o', '6189', 'd', '191', 'p', '3213', '6963', 'r', 't', '3577', 't', 'q', 'w', '5811', 'x', '6509', '9395', '9481', '6179', '305', '5549', 'l', 'o', 'q', 'f', 'e', '5367', 'r', '4981', '1693', 'j', 'y']

A:
d, e, f, j, l, o, p, q, r, t, w, x, y, z
****