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:
['x', '493', 'x', '211', 'n', '143', '277', '191']
answer:
1, 2, 3, 4, 7, 9


question:
['311', '147', 'a', '149', 'h']
answer:
1, 3, 4, 7, 9


question:
['t', 't', 'o', '405', '115']
answer:

0, 1, 4, 5