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: ['b', 'g', '181', 'y', 'd', 'v', '95', 'h', 'n', '103', '41', 'm', 'h', '445', 'z']

Answer: 0, 1, 3, 4, 5, 8, 9


Question: ['h', '477', 'w', '315', 'k', 'd', '367', '411', '207', 'b', '81', 'k', 'f', '107', '103']

Answer: 0, 1, 2, 3, 4, 5, 6, 7, 8


Question: ['355', 'c', '311', 'n', 'e', 'g', 't', '469', 'a']

Answer:
1, 3, 4, 5, 6, 9