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: ['493', '119', '423', '371', 'r', 'y', 'u', '403', '87']

0, 1, 2, 3, 4, 7, 8, 9