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:['43', 'o', '247', '459', 'e', '251', 'h', '147']
Solution:
1, 2, 3, 4, 5, 7, 9