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:
['243', 't', '249', 'q', '459', '469', '301', 'j', '215', '21']
answer:
0, 1, 2, 3, 4, 5, 6, 9


question:
['h', 'o', 's', '335', '317', '279', '217', '485']
answer:
1, 2, 3, 4, 5, 7, 8, 9


question:
['n', 'l', 'a', '377']
answer:

3, 7


