itaiitai iwan naran yo
itaiitai iwan naran yo .
i t a i i t a i WORD_BOUNDARY i w a n WORD_BOUNDARY n a r a n WORD_BOUNDARY j o WORD_BOUNDARY
i t a i i t a i WORD_BOUNDARY i w a n WORD_BOUNDARY n a r a n WORD_BOUNDARY y o WORD_BOUNDARY