pero esos no son perros
pero esos no son perros ?
p e ɾ o WORD_BOUNDARY e s o s WORD_BOUNDARY n o WORD_BOUNDARY s o m WORD_BOUNDARY p e r o s WORD_BOUNDARY
p e r o WORD_BOUNDARY e s o s WORD_BOUNDARY n o WORD_BOUNDARY s o n WORD_BOUNDARY p e r r o s WORD_BOUNDARY