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: ['497', '247', 'v', '327', '237', '257', '475', 's', '335', 'k']

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


Question: ['g', 'j', '239', 'w', 'q', 'm', 'a', 'l', 'n', 'p', 'i', 'r']

Answer: 2, 3, 9


Question: ['g', 'r', 'k', 'v', 'z', '387', 'y', '465', '399', 'g', '479', 'r']

Answer:
3, 4, 5, 6, 7, 8, 9