koko o kaenai to ikenai tabun
koko o kaenai to ikenai tabun .
k o k o WORD_BOUNDARY o WORD_BOUNDARY k a e n a i WORD_BOUNDARY t o WORD_BOUNDARY i k e n a i WORD_BOUNDARY t a b ɯ n WORD_BOUNDARY
k o k o WORD_BOUNDARY o WORD_BOUNDARY k a e n a i WORD_BOUNDARY t o WORD_BOUNDARY i k e n a i WORD_BOUNDARY t a b u n WORD_BOUNDARY