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:
['71', 't', '267', 'x', 'l', '95', '439', '51', 'i', '497', '469', 'k', '341', 'y']
answer:
1, 2, 3, 4, 5, 6, 7, 9


question:
['s', '45']
answer:
4, 5


question:
['53', '489', '417', '141', '431', '345', 'n', 'h', '21', 'u', 't', 'u']
answer:

1, 2, 3, 4, 5, 7, 8, 9