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: ['j', 'a', 'z', 'h', '4129', '4159', 'm', 'o', 'o', '1193', '2905', '3083', 'q', 't', 'm', 'o', '673', '7547', 'n', 'c', 'r', 't', '2897', '4959', 'z', '2377', 'y', '7977', 'u', 'b', 's', 'w', 'e', 'd', '8051']

A: a, b, c, d, e, h, j, m, n, o, q, r, s, t, u, w, y, z
****
Q: ['u', '1343', 'd', 'c', '9567', 'e', 'd', 'y', 's', '4199', '3217', '2937', '9345', 'd', 'l', '9875', '5987', 'p', '2585', '5843', '9643', '2423', 'e', 'l', 's', '3503', 'b', 'w', '9685', 'p', '6055', 'k', 'e', 'e', 't', '865', '6071', 'j', '3439', 't']

A: b, c, d, e, j, k, l, p, s, t, u, w, y
****
Q: ['6817', '3175', 'x', 'n', 'c', '4417', '8909', 'z', '9857', '9565', '5257', '3455', '3213', 's', 'h', 'z', '3241']

A:
c, h, n, s, x, z
****