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:
['r', '233']
answer:
2, 3


question:
['183', '89', '35', 'e', 'e', '499', 'e', 'u', 'y', 'o', 'f', 'l']
answer:
1, 3, 4, 5, 8, 9


question:
['x', '63']
answer:

3, 6