kono naka ni mo nai ka
kono naka ni mo nai ka .
k o n o WORD_BOUNDARY n a k a WORD_BOUNDARY n i WORD_BOUNDARY m o WORD_BOUNDARY n a i WORD_BOUNDARY k a WORD_BOUNDARY
k o n o WORD_BOUNDARY n a k a WORD_BOUNDARY n i WORD_BOUNDARY m o WORD_BOUNDARY n a i WORD_BOUNDARY k a WORD_BOUNDARY