doko ni irereba ii no
doko ni irereba ii no ?
d o k o WORD_BOUNDARY n i WORD_BOUNDARY i r e r e b a WORD_BOUNDARY i i WORD_BOUNDARY n o WORD_BOUNDARY
d o k o WORD_BOUNDARY n i WORD_BOUNDARY i r e r e b a WORD_BOUNDARY i i WORD_BOUNDARY n o WORD_BOUNDARY