new (E ∨ F → A) → (((B → H) → D) → (F → (((F → D) → C) → ((A → H) → (B → (B ∨ G ∧ G) ∨ (G ∨ D)) ∨ H ∧ (F ∧ (G ∨ D) → E)))))
intro
intro
intro
intro
intro
left
intro
left
left
exact 5