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:
['397', '287', '401', '97']
answer:
0, 1, 2, 3, 4, 7, 8, 9


question:
['353', '231', 'w', 't', 'j', 'r', 'm', '455', 'i', '281', '215']
answer:
1, 2, 3, 4, 5, 8


question:
['321', '487', 'v', '241', 'k', '267', 'u']
answer:

1, 2, 3, 4, 6, 7, 8