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: ['7839', '849', '5651', '4275', 'e', '5453', 'h', '2099', '485', 'i', 'm', 'n', '6563', '5675', '4001', 'h', 'm', 'z', '3467', '4237', '5035', '5609', '8475', '5171', 'v', '3883', '8461', '8611', '4853', 'd']

A: d, e, h, i, m, n, v, z
****
Q: ['n', 'g', 'u', '2873', 'k', '4411', 'w', '8179', 'w', 'w', 'f', 'g', 'e', '7837', '3055', 'z', 's', '6037', 'n', '1479', 'c', '5311', 'i', 'w', 'z', '1891', '9663', 'y', 'f', 'h']

A: c, e, f, g, h, i, k, n, s, u, w, y, z
****
Q: ['m', 'l', 'f', 'g', '6519', '1035', '9183', '2805', 'k', 'p', 'p', 'i', '9019', '2127', 'l', 'q', '6891', '9697', 'z', '2937', '7353', 'c', '9293']

A:
c, f, g, i, k, l, m, p, q, z
****