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:
['z', '375', 'v', 'o', 'v', '31', 'u', 'x', 'q', 'x', '71', 'n', 'v']
answer:
1, 3, 5, 7


question:
['213', '321', 'z']
answer:
1, 2, 3


question:
['y', '421', '467', '243', 'd', '353', 'n']
answer:

1, 2, 3, 4, 5, 6, 7


