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:
['357', 'c', 'f', '3', 'q', 'w', 'm', 'l', '137', 'k']
answer:
1, 3, 5, 7


question:
['469', 'y', 'j', 'u', '475', 'k', 'k']
answer:
4, 5, 6, 7, 9


question:
['a', 'x', 'q', 'l', 'b', 'u', 'f']
answer:

-1