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: ['205', '347', '423', 'm', '363', 'u', 'g']

Answer: 0, 2, 3, 4, 5, 6, 7


Question: ['f', '463', '169', '175']

Answer: 1, 3, 4, 5, 6, 7, 9


Question: ['y', '219']

Answer:
1, 2, 9