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]: ['2247', 'w', 'h', '4675', '6153', 'f', '6029', 'o', 'd', 'j', 'z', 'y', 'i', '6899', '3917', 'u', '6447', '6405', 'a', '1705', '8585', 'v', 'f', 'r']
[A]: a, d, f, h, i, j, o, r, u, v, w, y, z


[Q]: ['e', 'c', '4241', '2685', 'o', '9859', 'z', '2647', 'b', 'c', 'y', '1985', '5985', '5709', '6655', 'q', 'z', '9933', '6817', '6477', '1837', 'x', 'p', '9251', '3787', 'v', '5741', 'e', 'p', '493', '5949', '5519', 'v', 'g', '1403', 'z', 'h', 'z']
[A]: b, c, e, g, h, o, p, q, v, x, y, z


[Q]: ['7773', '2501', 'h', '1197', 'j', '3341', '7483', 'w', 'v', '3741', '7665', '9295', '1243', 'x', '443', '7111', 'e', 'x', '4671', '541', '7965', 'b', '3087']
[A]:
b, e, h, j, v, w, x