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:
['h', '281', 'x', '471']
answer:
1, 2, 4, 7, 8


question:
['z', '271', 'h', 'm', '365']
answer:
1, 2, 3, 5, 6, 7


question:
['11', 'j', '387', 'j', '227', '357', '285', 'i', 'n', '471', '293', 'p', 'r', '149']
answer:

1, 2, 3, 4, 5, 7, 8, 9