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:
['173', 'r', 'a', 'n', 'h', 'o', 'w', '135', '321', '59', 'r', '295', 'r']
answer:
1, 2, 3, 5, 7, 9


question:
['479', '205', 'e', 'c', '57', 'm', 'i', '33', 'f', '45', 'z']
answer:
0, 2, 3, 4, 5, 7, 9


question:
['461', '475', '179']
answer:

1, 4, 5, 6, 7, 9