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:
['g', '169', '93', 'z', 'h', '493', 'r']
answer:
1, 3, 4, 6, 9


question:
['295', 'd', 's', '1', '201', 'n', 'f', '15', '151', '307', 'b', '103', '255']
answer:
0, 1, 2, 3, 5, 7, 9


question:
['t', 'v', '469', 'n']
answer:

4, 6, 9