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: ['679', '455', '1887', '63', 'n', '2851', '7663', 'v', '9305', '5759', 'd', '329', '9809', 'v', '5091', 'n', '111', 'x', 'e']
A:
d, e, n, v, x