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: ['w', 'b', 'w', 'm', 'j', 'd', 'q', '47', '221', 'b', '201', 'f']

Answer: 0, 1, 2, 4, 7


Question: ['425', 'a', '351', 'v']

Answer: 1, 2, 3, 4, 5


Question: ['279', '115']

Answer:
1, 2, 5, 7, 9