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', 'e', '17', 'q', '15', 'v']

Answer: 1, 5, 7


Question: ['b', 'm', '471']

Answer: 1, 4, 7


Question: ['419', 'v', 'x', '265', 'd', 'w', '127', 'y', '371', '377', '413', '419', 'b', '457', '399']

Answer:
1, 2, 3, 4, 5, 6, 7, 9