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:
['b', '351', 'g', 'k', '29', '15', '411', '97', 'r', '27', '279']
answer:
1, 2, 3, 4, 5, 7, 9


question:
['x', 'x', '145', 'p', '11', 'j', 'e', '93', '213', '89', '445', 'z', 'z']
answer:
1, 2, 3, 4, 5, 8, 9


question:
['425', 'p', 'a', 'w', '111', '427', 'w', 'a', '433', '51', 'i', 'y', 's', 'g', 'a']
answer:

1, 2, 3, 4, 5, 7