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:
['497', '21', '239', '487', '149', 'q']
answer:
1, 2, 3, 4, 7, 8, 9


question:
['437', 'e', 'b', 'f', '203', 't', '5', '461', 'e', '367', '391', '81']
answer:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9


question:
['k', 'd', '469', 'i', '99', 'k', '147', '389', '91', '97', 'j', 'g', '95']
answer:

1, 3, 4, 5, 6, 7, 8, 9