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:
['349', '327', 'c', 'a', '493', 'a', 'm', '337', '397', '213', '203', '139']
answer:
0, 1, 2, 3, 4, 7, 9


question:
['255', 'u', 's', 'g', '445']
answer:
2, 4, 5


question:
['133', '367', '315']
answer:

1, 3, 5, 6, 7