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', '269', '105', '315', 'c', '301', 'v', '441', '415', 't', 'a', 'o', 'u', '23', 'n']
answer:
0, 1, 2, 3, 4, 5, 6, 7, 9


question:
['397', 'x', 'e', '179', '105', '381']
answer:
0, 1, 3, 5, 7, 8, 9


question:
['375', 'p', 'f', 'c', 'p', 'v', 'h', '479', '447']
answer:

3, 4, 5, 7, 9