a ootobai no oto datta no
a ootobai no oto datta no ?
a WORD_BOUNDARY oː t o b a i WORD_BOUNDARY n o WORD_BOUNDARY o t o WORD_BOUNDARY d a t t a WORD_BOUNDARY n o WORD_BOUNDARY
a WORD_BOUNDARY o o t o b a i WORD_BOUNDARY n o WORD_BOUNDARY o t o WORD_BOUNDARY d a t t a WORD_BOUNDARY n o WORD_BOUNDARY