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:
['97', '147', 'j', 'm', 'c', '445']
answer:
1, 4, 5, 7, 9


question:
['387', '7', '93', '105', '181']
answer:

0, 1, 3, 5, 7, 8, 9