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四 よん色 しょく問題 もんだいではありませんでした
yonshoku mondaidewārimasendeshita

敬
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Noun
, 
Desu Copula

The polite, past negative form of 四色問題

1. It was not the four-color problem.

Past/Perfective
, 
Negative
, 
Polite
, 
Formal Register
, 
Mathematics

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四色問題ではありませんでした

四色問題ではありませんでした【よんしょくもんだいでわありませんでした】 Activity

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