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:
['s', 't', '189', 'j', 'r']
answer:
1, 8, 9


question:
['e', '325', '377', 'v', '35', 'n', '125', '195']
answer:
1, 2, 3, 5, 7, 9


question:
['x', '31', '357', '155', 'y', '347', '13', '443', '293', '413', 'y', '137']
answer:

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