import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String d = sc.nextLine();
		char[] ds = d.toCharArray();
		StringBuffer res = new StringBuffer();
		
		for(int i = ds.length -1 ; i >=0; i--){
			res.append(ds[i]);
		}
		
		System.out.println(res.toString());
	}

}
/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