aoi buubu mo aru shi
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a o i WORD_BOUNDARY b ɯː b ɯ WORD_BOUNDARY m o WORD_BOUNDARY a r ɯ WORD_BOUNDARY ʃ i WORD_BOUNDARY
a o i WORD_BOUNDARY b u u b u WORD_BOUNDARY m o WORD_BOUNDARY a r u WORD_BOUNDARY s h i WORD_BOUNDARY