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: ['c', '471', 'l', 'z', '23', 'c', '43', 'o', '175', 'w', 'c', 'p', '431']

Answer: 1, 2, 3, 4, 5, 7


Question: ['i', '249', '287']

Answer: 2, 4, 7, 8, 9


Question: ['n', 'n', '359', '395', 'b', '213', '177', 'c', '389']

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