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: ['v', '8083', '467', 'b', 'p', 'e', 'j', 'q', 'e', '6751', '1809', 'h', 'g', 't', 'u', 'u', 't', 'p', '2611', 'n', '9467', '9581', '8173', '1447']
A:
b, e, g, h, j, n, p, q, t, u, v