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

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


Question: ['389', 'v', '17', 'n', 'm']

Answer: 1, 3, 7, 8, 9


Question: ['165', '319']

Answer:
1, 3, 5, 6, 9