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]: ['w', 'o', 'l', '5331', 'k', '9325', '6759', '7931', '8185', 'w', 'h', 'h', 'x', '4357', '6845', 'v', 'o', '8401', 'u', 'g', 'f', 'j', 'j', '2493', '4753', 'c', 'm', '1469', '4307', 'm', '2737', 'n', 'y']
[A]: c, f, g, h, j, k, l, m, n, o, u, v, w, x, y


[Q]: ['r', '4655', 'm', 'l', '4371', 'o', '5331', '5469', 'j', 'u', '4915', 'v', 'i', 'f', 'j', '6139', 'y', '2423', '1271', '2289', '5565', '7561', '9697', 'e', 's', 'u', '9581', 'y', '6095', '5047', '625', '9047', 'd', 's', '8307', '3615', '8145']
[A]: d, e, f, i, j, l, m, o, r, s, u, v, y


[Q]: ['1279', '5161', '3369', '2885', 'r', 't', '6947', '8147', '6343', '8089', 'v', 'c', 't', '9669', 'n', 'e', 'l']
[A]:
c, e, l, n, r, t, v