new (H ∨ C → D) → (F → (D → (((A → I) → I) → ((G → I) → (((B → H) → A) → (I → (A → D) ∧ E ∨ (I ∧ D ∨ ((A → H) → I))))))))
intro
intro
intro
intro
intro
intro
intro
right
left
constructor
exact 6
exact 2