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:
['o', '61', '475', '457', 'a', 'o', 'z', '227', '415', 'z', 'x', 'y', '73', '205', 'y']
answer:
0, 1, 2, 3, 4, 5, 6, 7


question:
['n', 'q', 'z', 'r', '41', '345', '115', '487', '273', 'q', '219', 'i', '23']
answer:
1, 2, 3, 4, 5, 7, 8, 9


question:
['253', '79', 'b', 'w', '149', 'e', 'l', '351', 'q', '379', 'n', 'f', '137', '257', 'h']
answer:

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