import java.io.*;
import java.util.*;
import java.lang.*;

class Main{
		public static void main(String args[]) throws IOException{
			Scanner scan = new Scanner(System.in);
			char[] buf = new char[20];

			int n1,n2;
			while(scan.hasNext()){
				String str1 = scan.next();
				buf = str1.toCharArray();
			}
			for(int i = buf.length-1;i>=0;i--){
				System.out.print(buf[i]);
			}
			System.out.print("\n");
	}
}
/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