using System;

public class Program

{

    public static void Main()

    {

        int a,b;

        Console.WriteLine("enter 2 numbers:");

        a=int.Parse(Console.ReadLine());

        b=int.Parse(Console.ReadLine());

        if(a>0&&b>0)

        {

            Console.WriteLine("positive");

        }

         if (a<0&&b<0)

        {

            Console.WriteLine("negative");

        }

        else if (a==0&&b==0)

        {

            Console.WriteLine("zero");

        }

        else

        {

            Console.WriteLine("unknown");

        }

    }

}