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: ['t', 'p', 'u', 'a']

Answer: -1


Question: ['93', '277', '373', 'z', '9', 'r', '251', '207', 'v', 'n']

Answer: 0, 1, 2, 3, 5, 7, 9


Question: ['m', '57', '455', '237', '411']

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