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:
['w', 'b', 'w', 'm', 'j', 'd', 'q', '47', '221', 'b', '201', 'f']
answer:
0, 1, 2, 4, 7


question:
['k', 'a', '437', '461', 'b', '341', '175']
answer:
1, 3, 4, 5, 6, 7


question:
['i', 'n', 'v', 'k', 'x', '189', 'h', '259', '391', 'z']
answer:

1, 2, 3, 5, 8, 9