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:
['h', 'e', 'v']
answer:
-1


question:
['o', 'e', '187', '153', 'a', '253', 'f']
answer:
1, 2, 3, 5, 7, 8


question:
['y', '471', '31', '251', '9']
answer:

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


