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: ['q', 'u', '199', 'v', '249']

Answer: 1, 2, 4, 9


Question: ['v', 'w', '125', 'r', 'a', '309', '259', 'c', 'a', 'c', 'w', '273', '279']

Answer: 0, 1, 2, 3, 5, 7, 9


Question: ['391', 'c', 's', 'z', 'i', 'd', 'c', '197', 'j', '369', '1', '59']

Answer:
1, 3, 5, 6, 7, 9