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: ['z', '5601', '5675', 'w', 's', 'z', '9213', '9563', '1699', 'p', 'g', 'm', 'c', '9279', '4481', 'p', 'n', '2389', 'c', '503', '1901', '8827', '1701', '1607', '5633', 'a', 'z', 'g', '3175', 's', 'l', 'l', '6811', '1821', '693', '8277', 'q', '8623', 'o']
Example Output: a, c, g, l, m, n, o, p, q, s, w, z

Example Input: ['2633', 'd', 'r', '8083', 'f', 'd', '5121', '8651', 'o', 'b', '811', '7551', 'x', 'p', 'm', 'v', 'm', '7833', '1959', 'y', 'p', '779', '1889']
Example Output: b, d, f, m, o, p, r, v, x, y

Example Input: ['1393', '6717', 'd', 'a', 'd', 'p', '6249', 'x', '2777', '585', '167', '3043', '1791', 'd', 'n', 'w', '3213', '2173', '6325', '555', 'o', '4425', '9799', 'j', 'g', 'l', '3879', 'd']
Example Output:
a, d, g, j, l, n, o, p, w, x