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: ['q', 'u', '199', 'v', '249']

Answer: 1, 2, 4, 9


Question: ['119', '329', 'w']

Answer: 1, 2, 3, 9


Question: ['289', '449']

Answer:
2, 4, 8, 9