korokoro ni naranai wa yo
korokoro ni naranai wa yo .
k o r o k o r o WORD_BOUNDARY n i WORD_BOUNDARY n a r a n a i WORD_BOUNDARY w a WORD_BOUNDARY j o WORD_BOUNDARY
k o r o k o r o WORD_BOUNDARY n i WORD_BOUNDARY n a r a n a i WORD_BOUNDARY w a WORD_BOUNDARY y o WORD_BOUNDARY