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', 'l', 's', '249', 'e', 'h', 'l']
answer:
2, 4, 9


question:
['j', 'd', '445', 'g', '263', '217', '357', 'c', '57', 'x']
answer:
1, 2, 3, 4, 5, 6, 7


question:
['e', 'x', 'r', '231', '173']
answer:

1, 2, 3, 7