doko ga itaiitai na no
doko ga itaiitai na no ?
d o k o WORD_BOUNDARY g a WORD_BOUNDARY i t a i i t a i WORD_BOUNDARY n a WORD_BOUNDARY n o WORD_BOUNDARY
d o k o WORD_BOUNDARY g a WORD_BOUNDARY i t a i i t a i WORD_BOUNDARY n a WORD_BOUNDARY n o WORD_BOUNDARY