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:
['361', '47', 'k', '33']
answer:
1, 3, 4, 6, 7


question:
['499', '493', 'i', '87']
answer:
3, 4, 7, 8, 9


question:
['243', 'u']
answer:

2, 3, 4