Detailed Instructions: 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: ['1587', '9207', 'd', '9489', 'm', 'm', '6055', '1533', 'f', '3881', 'l', '1143', '5677', '3709', '8371', '8243', '203', 'i', '8743', 'x', 't', '6197', '1185', '7071', 'z', 'y', '7033', 'd']
A:
d, f, i, l, m, t, x, y, z