class A 
{ 
	int a = 10;
}
class B extends A
{ 
	boolean c = true;
}
class C extends A
{ 
	char g = 'K';
}
class D extends A
{
	float b = 20.525f;
	public static void main(String[] args) 
	{
		System.out.println("Hello World!");
		A s1 = new A();
		System.out.println(s1.a);
		B s2 = new B();
		System.out.println(s2.c);
		System.out.println(s2.a);
		C s3 = new C();
		System.out.println(s3.g);
		//System.out.println(s3.c);
		System.out.println(s3.a);
		D s4 = new D();
		System.out.println(s4.a);
		//System.out.println(s4.c);
		//System.out.println(s4.g);
		System.out.println(s4.b);
		
	}
}