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:
['i', 'f', 'g', '267', '113', '93', 'r', '401', 'g', 'e']
answer:
0, 1, 2, 3, 4, 6, 7, 9


question:
['u', 'm', 'n', 'h', 'u']
answer:
-1


question:
['o', 'z', '55']
answer:

5


