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', 'c', '299', 'g', '33', 'o', '485', '345', '295', 'm', '345', 'q', '431', '151']
answer:
1, 2, 3, 4, 5, 8, 9


question:
['185', '425']
answer:
1, 2, 4, 5, 8


question:
['d', 'o', 'x', 'd', 'g', 'f', 'd', 'q', '257', '347', '361', '481']
answer:

1, 2, 3, 4, 5, 6, 7, 8