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: ['49', 'r', '179', 'h', 'q', 'h', 'w', '187', '427', 'x', 'r']

Answer: 1, 2, 4, 7, 8, 9


Question: ['z', '209']

Answer: 0, 2, 9


Question: ['377', '387', 'd', 'k', 'a']

Answer:
3, 7, 8