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: ['o', 'l', '6613', 'o', 'h', '2279', 'j', '4841', 'b', '4057', 'o', '2251', 'c', 'r', '8337', 'k', 'i', '4155', '4009', '4757', '3153', '7251', '4927', '423', 'e']
A:
b, c, e, h, i, j, k, l, o, r