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: ['493', '441', '3', 'p', '23', 'x', 'n', '417', '299', 'v', 'l', '415']

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


Question: ['j', '131', 'e', 'c', '149', '325', 'h', 'l', 'i', 'q', '151']

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


Question: ['b', 'f', 'l', '479', 'b']

Answer:
4, 7, 9