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: ['p', '231', 'd', 'i', '33', '431']

Answer: 1, 2, 3, 4


Question: ['k', '373', 'b', '305', 'i', 'n', 'z', 'm', 'c']

Answer: 0, 3, 5, 7


Question: ['q', 'q', 'q', 'm', 'f', '193', 'v', '29', 'b']

Answer:
1, 2, 3, 9