import java.util.Scanner;
import java.lang.*;

public class Main{

	public static String reverse(String str){
		
			if(str.length() == 1){
				return str;
			}else{
				
				return  reverse(str.substring(1)) + str.substring(0,1);
				
			}
		
		}

	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		
		String str = scan.next();
		
		str = reverse(str);
		
		System.out.println(str);
		
		
		
	}

}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz