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: ['463', '381', '373', '375', '265', '145', '399', '21', 'x', '261']

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