unfold G0, G1_1.
comp_swap_l.
comp_skip.
unfold PRF_h_A.
simpl.
inline_first.
comp_skip.
comp_simp.
inline_first.
unfold f_oracle.
eapply comp_spec_eq_impl_eq.
comp_skip.
eapply (@oc_comp_spec_eq _ _ _ _ _ _ _ _ _ _ _ _ _ _ (fun a b => True)).
trivial.
intuition.
inline_first.
comp_simp.
inline_first.
comp_simp.
simpl.
eapply comp_spec_ret; intuition.
simpl in *.
intuition; subst.
comp_simp.
simpl.
inline_first.
comp_simp.
eapply comp_spec_eq_refl.
Qed.

Theorem G1_1_2_close :
| Pr[G1_1] - Pr[G1_2] | <= PRF_Advantage ({0, 1}^c) ({0, 1}^c) h _ _ PRF_h_A.