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: ['h', 't', 'c', '5', 'h', 'v', '497', 'h', '185', '323', '481', 's', 'i']

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