a koko ni mada atta
a koko ni mada atta .
a WORD_BOUNDARY k o k o WORD_BOUNDARY n i WORD_BOUNDARY m a d a WORD_BOUNDARY a t t a WORD_BOUNDARY
a WORD_BOUNDARY k o k o WORD_BOUNDARY n i WORD_BOUNDARY m a d a WORD_BOUNDARY a t t a WORD_BOUNDARY