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: ['s', '443', '239', 't', '99']

Answer: 2, 3, 4, 9


Question: ['j', 'v', 'q', '393', 'z', 'l', 'g', 'q', '193']

Answer: 1, 3, 9


Question: ['g', 'x']

Answer:
-1