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: ['l', 'n', '477', '227', '71', 'p', 'q', '277', '135', 'i']

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


Question: ['o', 'k', 'i']

Answer: -1


Question: ['71', '121', 't', 'z', 'e', 'z', 'g']

Answer:
1, 2, 7