a aoi buubuu wa inai
a aoi buubuu wa inai .
a WORD_BOUNDARY a o i WORD_BOUNDARY b ɯː b ɯː WORD_BOUNDARY w a WORD_BOUNDARY i n a i WORD_BOUNDARY
a WORD_BOUNDARY a o i WORD_BOUNDARY b u u b u u WORD_BOUNDARY w a WORD_BOUNDARY i n a i WORD_BOUNDARY