using System;

public class testArg

{

  public int val = 0;

​

 public testArg(int val)

 {

     this.val = val;

 }

}

​

public class Program

{

    public static void Main()

    {

        string s = "abcdc";

        //string added = "";

        testArg testarg = new testArg(2);

        checkIfPalindrome(s , testarg);

        Console.WriteLine( testarg.val);

    }

    public static void checkIfPalindrome(string s ,  testArg testarg)

    {

        //Console.WriteLine(added);

        if(s.Length < 2)

        {

            return;

        }

        if(s[0] == s[s.Length -1])

        {           

            checkIfPalindrome(s.Substring(1,s.Length-2) , testarg);     

        }

        else

        {           

            testarg = new testArg(4);           

            checkIfPalindrome(s.Substring(1,s.Length-1), testarg)   ;

        }

    }

}