What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? r -> r_8. p_3 -> r_8. r_8 -> p_3. p_3 -> r.
r -> p_3. r_8 -> r. p_3 -> r_8. p_3 <-> r_8. r_8 <-> p_3.