koko ni atta koko ni atta
koko ni atta koko ni atta .
k o k o WORD_BOUNDARY n i WORD_BOUNDARY a t t a WORD_BOUNDARY k o k o WORD_BOUNDARY n i WORD_BOUNDARY a t t a WORD_BOUNDARY
k o k o WORD_BOUNDARY n i WORD_BOUNDARY a t t a WORD_BOUNDARY k o k o WORD_BOUNDARY n i WORD_BOUNDARY a t t a WORD_BOUNDARY