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:
['o', 'k', 'i']
answer:
-1


question:
['s', 'd']
answer:
-1


question:
['c', '231']
answer:

1, 2, 3


