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: ['305', '95', 'e', 'q', 'e', '341', 'u', 'w', '5911', '6851', 's', 'u', '2355', 'd', '4151', 'w', '4421', '1129', '8065', 'k', 'q', '3649']
Example Output: d, e, k, q, s, u, w

Example Input: ['7187', '7081', 'j', 'i', '3725', '6333', 'h', 'f', '6639', 'r', 'n', '3559', '2785']
Example Output: f, h, i, j, n, r

Example Input: ['f', 'a', '3553', 'j', '4135', '9393', 'y', '4891', 'u', '3923', '5491', '8705', '3365', '2783', 'k', 'd', 'a', '4439', 'd', 's', 'n', 'z', 'e', 'x', 'u', '361', '5795', 'j', '5693', 'c', 'j', 'w', 'h', '2287', 'd', '7745', '6133', '5103', '9077', 'j']
Example Output:
a, c, d, e, f, h, j, k, n, s, u, w, x, y, z