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


question:
['t', 'p', 'j', 'x', 'k', '295', '221', '261', '221', 'b', '431', '427']
answer:
1, 2, 3, 4, 5, 6, 7, 9


question:
['393', '407', '343', 'h', '411', '347', '181', '69', '317', '325', 'e', '331', '3', '267', 't']
answer:

0, 1, 2, 3, 4, 5, 6, 7, 8, 9