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:
['k', '413', '321', '209', 'k', '263']
answer:
0, 1, 2, 3, 4, 6, 9


question:
['t', '493', 's', 'f', '279', 'f']
answer:
2, 3, 4, 7, 9


question:
['287', '241', 'f', 'q', 'a', '127', 'y', '97', '175', 'u', 'b', '279', 't', 'y', '77']
answer:

1, 2, 4, 5, 7, 8, 9