import javax.swing.*;
public class string{
   public static void main(String args[])
   {
      String s = read();
      char c;
      int r = s.length();
     while(r>0)
   {
    --r;
      c = s.charAt(r);
      System.out.print(c);
  }
      System.exit(0);

  }
    //*******************
    public static String read() 
    {
      String s = new String();
      s = JOptionPane.showInputDialog("enter string:");
      return s;
   
    }
}