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:
['z', 'e', 'c']
answer:
-1


question:
['71', 't', '93', '301', 'g', '447', '373', 'd', '133', 'r']
answer:
0, 1, 3, 4, 7, 9


question:
['i', 'k', 'v', '37', 'm', 'n', 'w', 'o', '3', '437', '275', '377', 'r', 'o']
answer:

2, 3, 4, 5, 7