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:['169', '449', '123', '207', '343', 'y', '77', '469']
Solution:
0, 1, 2, 3, 4, 6, 7, 9