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: ['h', 'l', '43', 'b', 'g', '265', '355', 'y']

Answer: 2, 3, 4, 5, 6


Question: ['25', 'n', 'n', '481', 'w', '91', '251']

Answer: 1, 2, 4, 5, 8, 9


Question: ['c', '333', '463', 'h', 'h', '431', '233', '283', 'u']

Answer:
1, 2, 3, 4, 6, 8