import java.util.Scanner;
public class Reverse
{
   public static void main (String[] args)
   {
      Scanner scan = new Scanner(System.in);
      String s;

      System.out.print("Enter a string: ");
      s = scan.nextLine();
      reverse(s, s.length());
   }


   public static void reverse (String s, int i)
   {
       if (i < 1)
          System.out.println();
       else
       {
          System.out.print(s.charAt(i-1));
          reverse(s,i-1);
       }
   }

}