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## nenokku
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### Instructions
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You are given unknown amount of operations. There are 3 types of operations, you should handle each appropriately:
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1. "A word" - add the "word" into your "dictionary" of words.
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2. "? word" - check if the "word" is in your "dictionary".
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3. "x word" - end of operations.
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Intersection of words is counted as if it is in your dictionary (see example).
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Write a program that takes as arguments operations.
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```console
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$> ./main "? love" "? is" "A loveis" "? love" "? Who" "A Whoareyou" "? is"
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NO
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NO
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YES
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NO
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YES
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```
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