Detailed Instructions: In this task, you are given an input list A. You need to extract and sort the unique digits used in the list in ascending order. Return -1 if there is no digit in the list.
Problem:['445', '91', '141', '185', 'b', 'k', 'f', 'l', 'i', '229', 't', 'v']
Solution:
1, 2, 4, 5, 8, 9