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:
['403', 'j', 'x', '187', '311', 'g', 'z', 'p', '287', 'w', 'k', 'm']
answer:
0, 1, 2, 3, 4, 7, 8


question:
['197', 'q']
answer:
1, 7, 9


question:
['b', 'h']
answer:

-1