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:
['y', 'o', '287', 'm', 's', '61']
answer:
1, 2, 6, 7, 8


question:
['p', 'n', 'c', '113', '105', '423', 'k', 'a', '211', 'k', '91', '389']
answer:
0, 1, 2, 3, 4, 5, 8, 9


question:
['v', 'h', 'o', '273']
answer:

2, 3, 7