/* 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
	{
		for (int i=0; i<3; i++){
			for (int j=0; j<3; j++){
				if (i==2) break;
				System.out.println(i + " " + j);
			}
		}
	}
}