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: ['n', '149', 'z', '37']

Answer: 1, 3, 4, 7, 9


Question: ['73', '199', '189', '27', 'm', '101', '61', '113', 'y', '169']

Answer: 0, 1, 2, 3, 6, 7, 8, 9


Question: ['m', '399', '461', 'e', 'n']

Answer:
1, 3, 4, 6, 9