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:['53', 'x', '393', '385', 'p', '207', 'o', 't', '497']
Solution:
0, 2, 3, 4, 5, 7, 8, 9