using System;

public class Program

{

    public static void Main()

    {

        int aux = 2;

        int sig = 1;

        int num = 0;

        while(num < 52){

            while(aux <= 4){

                num = num + 4;

                aux++;

                if(sig%2 == 0)

                    Console.WriteLine(num); 

                else

                    Console.WriteLine(num*(-1)) ;

                if(num == 52)

                    break;

            }

            sig++;

            aux = 1;

        }

    }

}