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: ['53', '167', '377', '451', 'm', '121', 'i', '99', '189', 'u']

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