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:
['255', '19', '335', '483', 'r', 'c', 'r', 'o', '189', '71', '379', 'l', 'b']
answer:
1, 2, 3, 4, 5, 7, 8, 9


question:
['g', 'j', '239', 'w', 'q', 'm', 'a', 'l', 'n', 'p', 'i', 'r']
answer:
2, 3, 9


question:
['l', 'b', 'a', 'y', '13']
answer:

1, 3