import java.util.Scanner;
public class Exe6_3 {
  public static String string_reverse ( String input_string) {
    String new_string = "";
    //コードを書いてください;
    return new_string;
  }
  public static void main ( String [] args) {
   Scanner input = new Scanner(System.in);
   String input_string, output_string;

   System.out.println("Please input a string.");
   input_string = input.next();

   output_string = string_reverse(input_string);
   System.out.println("Reverse string is:");   
   System.out.println(output_string);
   
  } // main
} // Exe6_3