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: ['b', '351', 'g', 'k', '29', '15', '411', '97', 'r', '27', '279']

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


Question: ['h', 'o', 's', '335', '317', '279', '217', '485']

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


Question: ['121', 'm', 'n', '143', '281', 'c', 'j']

Answer:
1, 2, 3, 4, 8