Problem:
Reverse Sequence

Write a program which reverses a given string str.

Input

str (the size of str ≤ 20) is given in a line.

Output

Print the reversed str in a line.

Sample Input

w32nimda

Output for the Sample Input

admin23w

Solution in JAVA (judge verdict: WA: Presentation Error)

import java.util.Scanner;

public class Main {

    static private void printBWD(String str, int n) {
        if (n < str.length()) {
            printBWD(str, n + 1);
            System.out.print(str.charAt(n));
        }
        return;
    }

    public static void main (String[] args) {
        Scanner sc = new Scanner(System.in);
        String line = sc.next();
        printBWD(line, 0);
    }
}