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', '251', 'b', '241', 'z', '255']
answer:
1, 2, 4, 5


question:
['v', 'w', '125', 'r', 'a', '309', '259', 'c', 'a', 'c', 'w', '273', '279']
answer:
0, 1, 2, 3, 5, 7, 9


question:
['q', 'p', 'g', 'f', 'n', '113', '33']
answer:

1, 3