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

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


Question: ['g', '185', '73', 'h', '455', '333', 'l', '403', 'k', 'e', '77', '429', '423', '453']

Answer: 0, 1, 2, 3, 4, 5, 7, 8, 9


Question: ['325', '361', 'y', 'm', '229', 'y', 'y', '211']

Answer:
1, 2, 3, 5, 6, 9