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: ['k', 'a', '437', '461', 'b', '341', '175']

Answer: 1, 3, 4, 5, 6, 7


Question: ['475', '19', 'k', '307', '417']

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


Question: ['d', 'n', 'w', '447', 'w', 'j', 'o', 'x', '433', 's', '45']

Answer:
3, 4, 5, 7