public class RecurseTest
{
   public static void main (String [] args)
	{  
      String result;
	   result =  mystery("DELIVER");
	  // System.out.println (result);
	}// end main
	
	
		 
		public static String mystery (String s)
		{
  			String s1 = s.substring (0,1);
         String s2 = s.substring (1,s.length() - 1);
         String s3 = s.substring (s.length() - 1);
     		if (s.length() <= 3)
     			return s3 + s2 + s1;
  			else
     			return s1 + mystery (s2) + s3;
		} // END mystery
	
} // end class