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:
['t', 'r', 'z']
answer:
-1


question:
['u', '465', '129', 'o']
answer:
1, 2, 4, 5, 6, 9


question:
['c', 'n', '237', 'i', 'g']
answer:

2, 3, 7