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: ['k', '107', '333', '317', 'm', 'w', 'g', 'f']

Answer: 0, 1, 3, 7


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

Answer: -1


Question: ['g', '337', 'n', 'b', '371', 't']

Answer:
1, 3, 7