nakanaka hi ga awanai kara
nakanaka hi ga awanai kara .
n a k a n a k a WORD_BOUNDARY h i WORD_BOUNDARY g a WORD_BOUNDARY a w a n a i WORD_BOUNDARY k a r a WORD_BOUNDARY
n a k a n a k a WORD_BOUNDARY h i WORD_BOUNDARY g a WORD_BOUNDARY a w a n a i WORD_BOUNDARY k a r a WORD_BOUNDARY