mita koto ga nai kara wakaranai ne
mita koto ga nai kara wakaranai ne .
m i t a WORD_BOUNDARY k o t o WORD_BOUNDARY g a WORD_BOUNDARY n a i WORD_BOUNDARY k a r a WORD_BOUNDARY w a k a r a n a i WORD_BOUNDARY n e WORD_BOUNDARY
m i t a WORD_BOUNDARY k o t o WORD_BOUNDARY g a WORD_BOUNDARY n a i WORD_BOUNDARY k a r a WORD_BOUNDARY w a k a r a n a i WORD_BOUNDARY n e WORD_BOUNDARY