Sort u →
  {C : Type u_1} →
    [inst : CategoryTheory.Category.{v_1, u_1} C] →
      [inst_1 : CategoryTheory.Abelian C] →
        {S₁ S₂ : CategoryTheory.ShortComplex.SnakeInput C} →
          S₁.Hom S₂ →
            {C' : Type u_1} →
              [inst' : CategoryTheory.Category.{v_1, u_1} C'] →
                [inst'_1 : CategoryTheory.Abelian C'] →
                  {S₁' S₂' : CategoryTheory.ShortComplex.SnakeInput C'} → S₁'.Hom S₂' → Sort u