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: ['m', 'n', '151', '493', '149', 'e', '267', 'n', '481']

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