instruction:
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.
question:
['3', '181', 'o', '425', 'f', '391']
answer:
1, 2, 3, 4, 5, 8, 9


question:
['187', '461', 'b']
answer:
1, 4, 6, 7, 8


question:
['201', 'm', '157', 's', 'n', 'i', '325', 'x', '247', 'u', '187', 'e', '199']
answer:

0, 1, 2, 3, 4, 5, 7, 8, 9