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', '285', '277', 't', '23', '261', '429', '319', '447']

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