import java.util.*;
public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		mm();
	}
	static String mm(){
		String name;
		name = sc.next();
		StringBuffer sb = new StringBuffer(name);
	        name = sb.reverse().toString();
	        System.out.println(name);
	        return name;
	}
}