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: ['v', 'w', 'k']

Answer: -1


Question: ['51', '461', '343', '15', '209', '51']

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


Question: ['a', '393', 'i', 'j', 'q', 'r', '409', '119', 'b', '159', 'f', 'y', 'o']

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