bumbun tte nan no koto
bumbun tte nan no koto ?
b ɯ m b ɯ n WORD_BOUNDARY t t e WORD_BOUNDARY n a n WORD_BOUNDARY n o WORD_BOUNDARY k o t o WORD_BOUNDARY
b u m b u n WORD_BOUNDARY t t e WORD_BOUNDARY n a n WORD_BOUNDARY n o WORD_BOUNDARY k o t o WORD_BOUNDARY