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: ['475', 's', '123', '389', 'y', 'm', 'v', '47', 'u', '479', '357', '279', '137', 'l', 'i']

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


Question: ['d', '71', '65', '177', 'k']

Answer: 1, 5, 6, 7


Question: ['z', '79', '51', '159', '325', '349', 'p']

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