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: ['251', '173', '301', '339', '267', 'p', '347']

Answer: 0, 1, 2, 3, 4, 5, 6, 7, 9


Question: ['183', '89', '35', 'e', 'e', '499', 'e', 'u', 'y', 'o', 'f', 'l']

Answer: 1, 3, 4, 5, 8, 9


Question: ['209', 'g', 'g', '183', '69', '393']

Answer:
0, 1, 2, 3, 6, 8, 9