import java.util.Scanner;

public class FirstSample {

    public static void main(String[] args) {

            int x = 0;
            int y = 0;
            while ( x < 5 ) {
                System.out.print(x + "" + y + " ");
                x = x + 1;

            if ( y < 5 ) {
                x = x + 1;
                if ( y < 3 ) {
                    x = x - 1;
                }
            }
            y = y + 2;


        }
    }
}