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', '413', '321', '209', 'k', '263']

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


Question: ['251', '173', '301', '339', '267', 'p', '347']

Answer: 0, 1, 2, 3, 4, 5, 6, 7, 9


Question: ['b', '243', '43', '33', '165', 'y', '1', '109', 's', '129', 't', 'f']

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