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:
['v', '105', 'p', 'w', '295', '239', '453']
answer:
0, 1, 2, 3, 4, 5, 9


question:
['k', '233', 'h', 'd', 's', '83', '149', 'p', 'm']
answer:
1, 2, 3, 4, 8, 9


question:
['v', 'n', '319', '127']
answer:

1, 2, 3, 7, 9