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: ['c', '317', 'z', 'z', 'h', '227', '439', 'x', 'f']

Answer: 1, 2, 3, 4, 7, 9


Question: ['i', 'e', '17', 'q', '15', 'v']

Answer: 1, 5, 7


Question: ['a', 'l']

Answer:
-1