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:
['469', 'y', 'j', 'u', '475', 'k', 'k']
answer:
4, 5, 6, 7, 9


question:
['13', 'p', '427', 's', 'x', 'x', '43', 'h', 'j', 'z', '21']
answer:
1, 2, 3, 4, 7


question:
['i', '61', 'd', 'd', 'h', '443', '419', 'u', '459', '29']
answer:

1, 2, 3, 4, 5, 6, 9