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:
['j', 't']
answer:
-1


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


question:
['247', 'p', '249', '189', 'm', '483', 'p', '357', 'y', 'i', '231', '215']
answer:

1, 2, 3, 4, 5, 7, 8, 9