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: ['99', '245', 'c', '435', '255', 'v']

Answer: 2, 3, 4, 5, 9


Question: ['s', 'd']

Answer: -1


Question: ['57', 't', 'o', '265', 'n', '379', '399', 'u', '403', 'k']

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