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: ['k', 'j', 'v', '5277', '8607', 'n', '1109', 'e', 'k', '6579', 'o', '2909', 'u', 't', '9685', '8443', '9257', '8071', 'y', 'b', 'h', '4767', 'a', 'j', '8455', 'b', '7733', '2553', 'e']
Example Output: a, b, e, h, j, k, n, o, t, u, v, y

Example Input: ['4925', 'i', 'q', 'k', '7615', 'r', '7217', 'o', '8097', '9151']
Example Output: i, k, o, q, r

Example Input: ['1657', 'u', '2221', 'k', '123', '735', '6743', '8149', '3125', 'l', 'x', 'o', '805', 'w', '3615', '5007', '5335']
Example Output:
k, l, o, u, w, x