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: ['345', 'k']

Answer: 3, 4, 5


Question: ['119', '189', 'k', 'e', '425', '21', '245']

Answer: 1, 2, 4, 5, 8, 9


Question: ['a', 'f', 'o']

Answer:
-1