new (A → J) → (A → (E ∧ G → ((C → ((G → C) → H)) → ((H → F ∧ D) → ((J → G) → (((G → C) → F) → (B ∨ J → (((I → C) ∨ (G ∧ A ∨ F) → (I ∨ F) ∨ (H → C)) → A))))))))
intro
intro
intro
cases 2
intro
intro
intro
intro
intro
cases 2
intro
cases 2
exact 1