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:
['z', 't', 'm', '295', '459', 'r', 'k', '149', '263', '5', '57', '455']
answer:
1, 2, 3, 4, 5, 6, 7, 9


question:
['397', '287', '401', '97']
answer:
0, 1, 2, 3, 4, 7, 8, 9


question:
['431', 'v']
answer:

1, 3, 4