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: ['477', '293', '301', '269', '149', 'm']

Answer: 0, 1, 2, 3, 4, 6, 7, 9


Question: ['207', '219', '373', '93']

Answer:
0, 1, 2, 3, 7, 9