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;