using static System.Console;

using System.Text;

​

public class Program {

    public static void Main() {

        WriteLine(" Digite a Palavra");

        var s = ReadLine();

        var revs = new StringBuilder(s.Length);

        for (int i = s.Length - 1; i >= 0; i--) revs.Append(s.Substring(i, 1));

        WriteLine(revs);

    }

}