nakatta no wakatta okao nai no
nakatta no wakatta okao nai no ?
n a k a t t a WORD_BOUNDARY n o WORD_BOUNDARY w a k a t t a WORD_BOUNDARY o k a o WORD_BOUNDARY n a i WORD_BOUNDARY n o WORD_BOUNDARY
n a k a t t a WORD_BOUNDARY n o WORD_BOUNDARY w a k a t t a WORD_BOUNDARY o k a o WORD_BOUNDARY n a i WORD_BOUNDARY n o WORD_BOUNDARY