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: ['z', 'v', 't', 'm', '51', 'e', 'l', 'l', '83', '301', '21', '347', 'm', '41', 'b']

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


Question: ['499', '493', 'i', '87']

Answer: 3, 4, 7, 8, 9


Question: ['u', '403', '167', 'z', '243', '161', '449', 'q', 'l', '273', 'u', '427', 'h', '147']

Answer:
0, 1, 2, 3, 4, 6, 7, 9