Detailed Instructions: 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: ['i', 'f', 'w', 'o', 't', 'k', 'd', 'd', 'n', 'l', '5351', '5861', '9777', '683', 'k', 'g', '8765', '5341', '4415', 't', 'a', '7421', 'r', 'h', '6417', '7745', 'y', 'q', '6515', '6437', 'h', '5615', '4521', 'o', '3061', '3733', 'f', '2823', 'h', '6845', 'j', 'j', 'f', 'e', '8989']
A:
a, d, e, f, g, h, i, j, k, l, n, o, q, r, t, w, y