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:
['119', '189', 'k', 'e', '425', '21', '245']
answer:
1, 2, 4, 5, 8, 9


question:
['k', '135', '297']
answer:
1, 2, 3, 5, 7, 9


question:
['431', '367', '139', '167', '217', '245']
answer:

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