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:
['a', '491', '477', '193', 'b', 'l', 'c']
answer:
1, 3, 4, 7, 9


question:
['39', '461', '163', '379', '331', '137', 'g', 'm']
answer:
1, 3, 4, 6, 7, 9


question:
['c', 'a', 'p', '175', 'q', '485', 'u', 'n', 'd', '219']
answer:

1, 2, 4, 5, 7, 8, 9