aoi buubuu ka akai buubuu ka wakaranai wa yo
aoi buubuu ka akai buubuu ka wakaranai wa yo .
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a o i WORD_BOUNDARY b u u b u u WORD_BOUNDARY k a WORD_BOUNDARY a k a i WORD_BOUNDARY b u u b u u WORD_BOUNDARY k a WORD_BOUNDARY w a k a r a n a i WORD_BOUNDARY w a WORD_BOUNDARY y o WORD_BOUNDARY