using System;

public class Program

{

    public static void Main()

    {

        int n,r=0,a,k;

        n=Convert.ToInt32(Console.ReadLine());

        k=n;

        while(n>0)

        {

            a=n%10;

            r=(r*10)+a;

            n=n/10;

        }

        if(r==k)

        {

            Console.WriteLine("pal");

        }

        else

            Console.WriteLine("not pal");

    }

}