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]: ['2165', 'f', '5081', 's']
[A]: f, s


[Q]: ['1487', '8003', 'd', '7237', 'l', 'y', '2749', 'e', '9685', '2825', 'z', '7743', 'r', '9617', 'w', '4323', '2173', '8419', '2831', '8923', 'l', '2985', '303', 'y', '9409', 'i', 'h', 'e']
[A]: d, e, h, i, l, r, w, y, z


[Q]: ['c', 'q', '5427', 'j', '2339', '6979', 'b', '3503', 'b', 'c', 'a', '6305', 'w', '1495', '7955', 'k', 'x', '2259', '7671', '9959', '7301', 'h', '9483', '1433', '381', 'p', '5253', '1119', 'c']
[A]:
a, b, c, h, j, k, p, q, w, x