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: ['149', 'o', '237', 't', 'k', 'w']

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


Question: ['v', 'w', 'k']

Answer: -1


Question: ['353', '27']

Answer:
2, 3, 5, 7