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四 よん色 しょく問題 もんだいじゃない
yonshoku mondaijanai

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Noun
, 
Da Copula
, 
Negation Auxiliary

The negative form of 四色問題

1. Not the four-color problem.; It's not the four-color problem.

Negative
, 
Mathematics

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四色問題じゃない

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