{C : Type u} →
  {P : Sort u_1} →
    {W X Y Z : CategoryTheory.FreeMonoidalCategory C} →
      {f : W.Hom Y} →
        {g : X.Hom Z} →
          {W' X' Y' Z' : CategoryTheory.FreeMonoidalCategory C} →
            {f' : W'.Hom Y'} →
              {g' : X'.Hom Z'} →
                W.tensor X = W'.tensor X' →
                  Y.tensor Z = Y'.tensor Z' →
                    f.tensor g ≍ f'.tensor g' → (W ≍ W' → X ≍ X' → Y ≍ Y' → Z ≍ Z' → f ≍ f' → g ≍ g' → P) → P