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:
['7', 'u', 's', '75', 't', 'o']
answer:
5, 7


question:
['421', '99', '115', 'x']
answer:
1, 2, 4, 5, 9


question:
['n', '113', '387', '151', '11', '473', 'm']
answer:

1, 3, 4, 5, 7, 8