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:
['r', 'o', 'n', '219', 'a', '419', 'x', '261', 'h', 's', '373', '155', 's', '171']
answer:
1, 2, 3, 4, 5, 6, 7, 9


question:
['269', 'f', '321', '175', '15', 'n', 'b', 'z', '53', 'p', 'x', '457', 'q', 'b']
answer:
1, 2, 3, 4, 5, 6, 7, 9


question:
['427', '131', 'b', '329', 'a', 'x', 'e', '45']
answer:

1, 2, 3, 4, 5, 7, 9