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: ['239', '439']

Answer: 2, 3, 4, 9


Question: ['323', '243', '385', 'z', '345', 'v', '359', 'e', '215', '417', 'g', '445', '145', '413']

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


Question: ['v', '115', '471', 'a', '171']

Answer:
1, 4, 5, 7