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: ['71', 't', '267', 'x', 'l', '95', '439', '51', 'i', '497', '469', 'k', '341', 'y']

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


Question: ['119', '189', 'k', 'e', '425', '21', '245']

Answer: 1, 2, 4, 5, 8, 9


Question: ['e', '199', 'y', 't', 's', '375', 'r', 'c', 'm', '9', 'l', '305', '241']

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