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:
['45', '95', 'y', '363', '265', '307', '309', '423']
answer:
0, 2, 3, 4, 5, 6, 7, 9


question:
['v', 'p', 'g', '263', 'f', 'g', 'l', '473']
answer:

2, 3, 4, 6, 7