/* 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. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		int i = 1;
		int j = 2;
		
		System.out.println(i + " " + j);
		
		i ^= j;
		j ^= i;
		i ^= j;
		
		System.out.println(i + " " + j);
	}
}