class A<X> {}

class B<X, Y> {}

class C<X, Y> {}

class D<X extends A<X>, Y extends A<Y>> {}

D d;

class E<W extends B<W, X>, X extends C<W, X>, Y extends B<Y, Z>,
    Z extends C<Y, Z>> {}

E e;

class F<V extends num, W extends B<W, X>, X extends C<W, X>, Y extends B<W, X>,
    Z extends C<Y, Z>> {}

F f;

class G<V extends num, W extends B<V, X>, X extends C<W, V>, Y extends B<W, X>,
    Z extends C<Y, Z>> {}

G g;

class H<S extends A<S>, T extends B<T, U>, U extends C<T, U>, V extends A<V>,
    W extends S, X extends T, Y extends U, Z extends V> {}

H h;

class I<T extends U, U extends Y, V extends Function(W), W extends Function(X),
    X extends Function(V), Y extends Z, Z extends T> {}

I i;

class J<
    S extends T Function(U),
    T extends U Function(S),
    U extends S Function(T),
    V extends W,
    W extends X,
    X extends Y Function(V),
    Y extends Z,
    Z extends X> {}

J j;
main() {}