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.
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Question: ['397', 'x', 'e', '179', '105', '381']

Answer: 0, 1, 3, 5, 7, 8, 9


Question: ['e', '307', '191', 'k', 'o', 'j', '99']

Answer: 0, 1, 3, 7, 9


Question: ['l', '145', '479', '83', '287', 'o', '33', '33', '31', '13', '435', 'm', 'e']

Answer:
1, 2, 3, 4, 5, 7, 8, 9