new B ∧ E → ((B → C) → (D ∨ F → ((A ∧ A) ∧ G ∨ (E ∧ E → B) → ((F → D) → (C ∨ B) ∨ C ∧ ((A ∨ C) ∨ E)))))
intro
cases 0
intro
intro
intro
intro
cases 0
left
left
apply 3
exact 1