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: ['411', 'n']

Answer: 1, 4


Question: ['493', '241', '239', 'g', 'q', '319', '49', '245']

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


Question: ['b', '473', '347', '259', 'r', '475', '7', 'u']

Answer:
2, 3, 4, 5, 7, 9