interface Z {}
interface Y extends Z {}
class B implements Z {}
class A extends B implements Y {}
class C extends A {}
class Pekere{
public static void main(String[] args){
C c = new C();
B b = new B();
System.out.println(c instanceof Z);
System.out.println(c instanceof Y);
System.out.println(c instanceof A);
System.out.println(b instanceof Y);
Y y = c;
}
}