new (E → D ∧ D) → (E ∨ D → ((D ∧ (B ∧ C)) ∧ C → (G ∧ E → (A → (((D → G) → G) → (E ∨ C → (F ∨ (B → D) → A ∨ D) ∨ (D ∧ A ∨ E) ∧ A))))))
intro
intro
intro
cases 2
intro
cases 5
intro
intro
intro
cases 2
cases 3
cases 5
cases 11
cases 14
cases 18
left
intro
cases 2
cases 3
cases 5
cases 11
cases 14
cases 18
cases 24
cases 27
cases 31
cases 37
left
exact 8