Definition: 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.
Input: ['263', '481', 'a', 'y', '99', 'm', 'b', '175', 'b', 'f', 'g', '189']

1, 2, 3, 4, 5, 6, 7, 8, 9