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:
['m', 'e', 'g']
answer:
-1


question:
['387', '7', '93', '105', '181']
answer:
0, 1, 3, 5, 7, 8, 9


question:
['t', 'b', 'e', 'd', '405', '133', '173', 'o', 's', 'k', '255']
answer:

0, 1, 2, 3, 4, 5, 7