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:
['p', 'r', 'e', 'b', '149', '361', 'i']
answer:
1, 3, 4, 6, 9


question:
['k', '373', 'b', '305', 'i', 'n', 'z', 'm', 'c']
answer:
0, 3, 5, 7


question:
['301', '75', 'm', 'y', 'd', '201', '189', '121']
answer:

0, 1, 2, 3, 5, 7, 8, 9