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: ['i', 'f', '409', 'c', '83']

Answer: 0, 3, 4, 8, 9


Question: ['279', '115']

Answer: 1, 2, 5, 7, 9


Question: ['25', 'm', '491', '347', 'd', 'p', 'b', '349', '7', 'a', 'x', 'o']

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