nan tte itte ii ka wakannai
nan tte itte ii ka wakannai .
n a n WORD_BOUNDARY t t e WORD_BOUNDARY i t t e WORD_BOUNDARY i i WORD_BOUNDARY k a WORD_BOUNDARY w a k a n n a i WORD_BOUNDARY
n a n WORD_BOUNDARY t t e WORD_BOUNDARY i t t e WORD_BOUNDARY i i WORD_BOUNDARY k a WORD_BOUNDARY w a k a n n a i WORD_BOUNDARY