/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
public class Main {
	public static void main (String[] args) {
		Object obj1 = null;
		System.out.println(obj1);
		
		String obj2 = "NULL";
		System.out.println(obj2);
	}
}