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Sample Input对应的Output 应该是什么样的?"No duplicates."的前后有什么要求么?空格?回车? ---------------1------------------- 310-1010 2 310-4466 No duplicates. 487-3279 4 888-1200 No duplicates. 888-4567 3 967-1111 No duplicates. ---------------2------------------- 310-1010 2 No duplicates. 487-3279 4 No duplicates. 888-4567 3 No duplicates. ---------------3------------------- 310-1010 2 No duplicates.487-3279 4 No duplicates.888-4567 3 No duplicates. ---------------4-------------------- 310-1010 2 No duplicates. 487-3279 4 No duplicates. 888-4567 3 No duplicates. 以上的几种有符合要求的么? Followed by:
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