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: ['c', 'u', 'b', '347', '191']

Answer: 1, 3, 4, 7, 9


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

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


Question: ['w', 'w', '295', '197', '265', '1', 'k', 'z']

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