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: ['4653', 'e', 'c', 'j', '6739', '3963', 'q', '4649', 'v', 's', 'j', '9757', '8075', '6253', '4365', 's', '9101', 'd', '6989', 't', '5687', '7389', '139', '4029', '5073', 'q', 'e', '2455', '1075', 'j', '1329', 'l', '4689', 't', 'z', '4179', 's', 'l', 'w', 'n', '6569', '8907', 'v', '605', 'y']

A: c, d, e, j, l, n, q, s, t, v, w, y, z
****
Q: ['w', '8777', 'y', 'e', '8015', 't', 'w', '53', '9149', 'e', 'k', '1837', 'b', 's', '4007', '4905']

A: b, e, k, s, t, w, y
****
Q: ['t', '1517', '2331', '7113', '9191', 'g', '1761', 'r', 'j', '7917', 'v', '737', '9513', 'z', '7267', 'i', '751', 't', '2341', '3707', 'q', '3989', '1145']

A:
g, i, j, q, r, t, v, z
****