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:
['t', '493', 's', 'f', '279', 'f']
answer:
2, 3, 4, 7, 9


question:
['353', 'd', 'h', 'd']
answer:
3, 5


question:
['y', 'p', '237', 'a', 't', '79', '85', 'l', 'f', 'r', '323']
answer:

2, 3, 5, 7, 8, 9