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: ['159', 'y', '369', 'r', '341', '23', 's', '209', 'l', 's', '473']

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


Question: ['203', 'p', 'r', 'r', 'c', 'w', 'z', 'w', 'a', '203', 'n']

Answer: 0, 2, 3


Question: ['m', 'n', '151', '493', '149', 'e', '267', 'n', '481']

Answer:
1, 2, 3, 4, 5, 6, 7, 8, 9