import java.util.Scanner;

public class Main
{
    private final static Main main = new Main();

    public static void main(String[] args)
    {
        long l = System.currentTimeMillis();
        main.solve();
        //System.out.println("処理時間：" + (System.currentTimeMillis() - l));
    }

    private void solve()
    {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        for(int i=s.length()-1; i>=0; --i)
        {
            System.out.print(s.charAt(i));
        }
        System.out.println();
    }
}