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: ['v', '477', 'j', '339', '245', 'r', '417', 'g', '475', 'n', 'q', '171']

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


Question: ['451', 'd', '429', '23', '143', '223', 'm', '51']

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


Question: ['c', 'g', '179', 'm', 'a', '139', '191']

Answer:
1, 3, 7, 9