itaiitai na n da yo
itaiitai na n da yo .
i t a i i t a i WORD_BOUNDARY n a WORD_BOUNDARY n WORD_BOUNDARY d a WORD_BOUNDARY j o WORD_BOUNDARY
i t a i i t a i WORD_BOUNDARY n a WORD_BOUNDARY n WORD_BOUNDARY d a WORD_BOUNDARY y o WORD_BOUNDARY