fact: Variable Z : OracleComp (list (Bvector (HMAC_spec.b c p))) (Bvector (HMAC_spec.b c p)) (list (Bvector (HMAC_spec.b c p)) * list (Bvector (HMAC_spec.b c p))).
imports: FCF HMAC_spec PRF NMAC_to_HMAC hF GHMAC_PRF