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:
['221', '191', 'w', 'l', 'h', 'a']
answer:
1, 2, 9


question:
['25', 'b', '455', 'n', '305', '271']
answer:
0, 1, 2, 3, 4, 5, 7


question:
['v', '423', 't', 'j', 'r', 'g', 'j', 't', '111', 'n']
answer:

1, 2, 3, 4