using System;

class ObrniString {
  static void Main() {
    Console.Write("Unesi string: ");
    string s = Console.ReadLine();
    Console.WriteLine(Obrni(s));
  }

  static string Obrni(string s) {
    string t = "";
    foreach(char c in s) { t = c + t; }
    return t;
  }
}