ai o pássaro caiu
ai o pássaro caiu .
ai WORD_BOUNDARY u WORD_BOUNDARY p a s ɐ ɾ u WORD_BOUNDARY k ɐ iu̜ WORD_BOUNDARY
a i WORD_BOUNDARY o WORD_BOUNDARY p á s s a r o WORD_BOUNDARY c a i u WORD_BOUNDARY . WORD_BOUNDARY