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:
['k', '373', 'b', '305', 'i', 'n', 'z', 'm', 'c']
answer:
0, 3, 5, 7


question:
['229', 'x', '49', 'p', '73', '77', '337', '497']
answer:
2, 3, 4, 7, 9


question:
['o', '267', 'j', 'm', '375', 'g', 't', '467']
answer:

2, 3, 4, 5, 6, 7