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:
['1', 'm']
answer:
1


question:
['j', 'v', 'q', '393', 'z', 'l', 'g', 'q', '193']
answer:
1, 3, 9


question:
['x', 'r', 'y', 'n', 'q', 'p']
answer:

-1