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: ['t', '437', 'o', 'w', 'x', 'e', 'r', 'r', '149', 'd', '391']

Answer: 1, 3, 4, 7, 9


Question: ['s', '45']

Answer: 4, 5


Question: ['x', '91', 'q', '417', '385', '455', '393', 'm', 's', 'c', '91', '71', 'n']

Answer:
1, 3, 4, 5, 7, 8, 9