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:
['233', '189', '217', 's', '221', 'v', 'c', 'x', '455']
answer:
1, 2, 3, 4, 5, 7, 8, 9


question:
['239', 's', 'h', 'w', '131', 'i', 'x']
answer:
1, 2, 3, 9


question:
['i', '73', '283', 'r', 'i', 'x']
answer:

2, 3, 7, 8