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:
['279', 'm', '453', 's', 'x', 'g', 'i', 'x', 'd']
answer:
2, 3, 4, 5, 7, 9


question:
['r', '321', '355', 'w', 'm', 'v', 'a', 'u', '455', 'n', '169']
answer:
1, 2, 3, 4, 5, 6, 9


question:
['b', 'o', 'n', 'b', 'a', 'p', 'g', 'i', 'c', 's', '31', 'j', '191', 'a', '283']
answer:

1, 2, 3, 8, 9