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:
['157', 'k', 'o', 'a', '279', 'g']
answer:
1, 2, 5, 7, 9


question:
['379', 'w', 'b', '385', '429', '3', '297', '297', 't', 'z', 'i', '207', 'e', 'a']
answer:
0, 2, 3, 4, 5, 7, 8, 9


question:
['473', '357', 'i', 'j', '299', 's', '495', '165', 'o', 'l', 'x', 'v', '1', 'o', '469']
answer:

1, 2, 3, 4, 5, 6, 7, 9