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: ['239', '439']

Answer: 2, 3, 4, 9


Question: ['y', 'm', '121', 'h', 'm', '189', '117', '257', 'y', '181', '279', 'a', '453']

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


Question: ['l', 'o', '481', '411', '335', 'u']

Answer:
1, 3, 4, 5, 8