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: ['2775', '7507', 'c', '4417', '3449', 'y', 'z', 'e', 'f', '9515', '8555', '7269', '8353', '4239', '4347', '4479', '8645', '9925', 'o', 'h', 'o', '8641', 'y', '3251', '1191', 't', 'x', 'z', '7203', 'b', 'b', '7545', '7283', 'z', 'y', '8127', 'x', 'l', '6251', 'y']

A: b, c, e, f, h, l, o, t, x, y, z
****
Q: ['d', 's', 'n', '7039', 't', '9035', '7663', '2981', 'a', 'l', 'm', '5401', '1071', 'x', '2995', '3363', '8619', '6253', 'p', '9065', '9533', 'g', 't', '4015', 'r', 'w', 'e', 'p', 'f', '9995', 'n', 'm', '7935', 'y', '9903', '2569', 'o', '4063', '79', '1545', 'q', 'l']

A:
a, d, e, f, g, l, m, n, o, p, q, r, s, t, w, x, y
****