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: ['s', '443', '239', 't', '99']

Answer: 2, 3, 4, 9


Question: ['345', 'h', '9']

Answer: 3, 4, 5, 9


Question: ['29', '55', '249', 'f', 'x', 'm', '275', '291', 'c', 'g', '449', '65', '159']

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