a tirar e tirar
a tirar e tirar .
a WORD_BOUNDARY t i ɾ a ɾ WORD_BOUNDARY e̞ WORD_BOUNDARY t i ɾ a ɾ WORD_BOUNDARY
a WORD_BOUNDARY t i r a r WORD_BOUNDARY e WORD_BOUNDARY t i r a r WORD_BOUNDARY . WORD_BOUNDARY