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:
['h', 't', '371', 'e', '153', 'b']
answer:
1, 3, 5, 7


question:
['229', '369', 'c', '7', 'f', 'h', '455', 't', '249', 's']
answer:
2, 3, 4, 5, 6, 7, 9


question:
['249', 'i', '147', 'w', 'w', 'u', 'z', 'w', 'e', '307', '225']
answer:

0, 1, 2, 3, 4, 5, 7, 9