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: ['187', 'm', 'i', 'q', '31', 'h', 'h', 'i', '317', '431', '31', 'b', 'v']

1, 3, 4, 7, 8