unfold A_NMAC_G1_0, A_NMAC_G1_1.
comp_skip.
eapply Rnd_split_equiv.
reflexivity.
Qed.

(* Specifications: *)
Theorem  A_NMAC_G1_1_equiv :
Pr[A_NMAC_G1_1] == Pr[A_NMAC_G1].