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: ['x', '493', 'x', '211', 'n', '143', '277', '191']

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


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: ['349', '355', 'i', '471', '133', '29', '341', '143', 'm', '201', '267', 'o', 't', 'c']

Answer:
0, 1, 2, 3, 4, 5, 6, 7, 9