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:
['g', '169', '93', 'z', 'h', '493', 'r']
answer:
1, 3, 4, 6, 9


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


question:
['w', 'u', '61', 'l', 'k']
answer:

1, 6