nan yatta ka na ima no
nan yatta ka na ima no .
n a n WORD_BOUNDARY j a t t a WORD_BOUNDARY k a WORD_BOUNDARY n a WORD_BOUNDARY i m a WORD_BOUNDARY n o WORD_BOUNDARY
n a n WORD_BOUNDARY y a t t a WORD_BOUNDARY k a WORD_BOUNDARY n a WORD_BOUNDARY i m a WORD_BOUNDARY n o WORD_BOUNDARY