using System;

public class Program

{

    public static void Main()

    {

        var toanhoc = new  ToanHoc();

        //toanhoc.tinhle();

        //toanhoc.giaithua();

        //int nn;

        //if (int.TryParse(Console.ReadLine(), out  nn))

        //{

        //  Console.WriteLine(toanhoc.TinhGiaiThua(nn));

        //}

        //else

        //{

            //Console.WriteLine("ssss");

            //Console.ReadLine();

        //}\

        Console.WriteLine(toanhoc.DaoChuoi(Console.ReadLine()));

    }

    public class ToanHoc

    {

        public int TinhLe(int n)

        {

            int tong =0;

            for (int i =0; i<= n ; i++)

            {

                if( i %2 !=0)

                {

                    tong =tong+i;

                }           

            }

            return tong;

        }

        public int TinhGiaiThua(int n1)

        {

                int tich =1;

                for (int j =1; j<=n1; j++)

                {

                    tich=tich*j;

                }

                return tich;

        }

        public string DaoChuoi(string chuoibandau)

        {

            var dem = chuoibandau.Length;

            var chuoiketqua = new char[dem];

            for (int i =0; i<= dem -1 ; i++)

            {

                chuoiketqua[dem-i-1] = chuoibandau[i];

            }

​

            return new string(chuoiketqua);

        }

    }

}