nenai no kai nenai no kai
nenai no kai nenai no kai ?
n e n a i WORD_BOUNDARY n o WORD_BOUNDARY k a i WORD_BOUNDARY n e n a i WORD_BOUNDARY n o WORD_BOUNDARY k a i WORD_BOUNDARY
n e n a i WORD_BOUNDARY n o WORD_BOUNDARY k a i WORD_BOUNDARY n e n a i WORD_BOUNDARY n o WORD_BOUNDARY k a i WORD_BOUNDARY