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:
['401', 'a', '273', 'c', '117', 'x', 'b', 'h', 's', 'v']
answer:
0, 1, 2, 3, 4, 7


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


question:
['w', 'j', 'e', '67']
answer:

6, 7