koko wakarenai n da yo ne
koko wakarenai n da yo ne .
k o k o WORD_BOUNDARY w a k a r e n a i WORD_BOUNDARY n WORD_BOUNDARY d a WORD_BOUNDARY j o WORD_BOUNDARY n e WORD_BOUNDARY
k o k o WORD_BOUNDARY w a k a r e n a i WORD_BOUNDARY n WORD_BOUNDARY d a WORD_BOUNDARY y o WORD_BOUNDARY n e WORD_BOUNDARY