using System;

public class Program

{

    public static void Main()

    {

    string nm = "nennen";

    string result = "";

    for(int i = nm.Length-1; i >=0; i--)

        {

            result = result + nm[i];

        }

    if(result == nm)

        {

            Console.WriteLine("String is palindrome");

        }

    else

        {

            Console.WriteLine("String is not palindrome");

        }

​

    }

}