import java.util.*;
import java.io.*;
class Main{
    public static void main(String[] args){
	try{
	    BufferedReader s = new BufferedReader(new InputStreamReader(System.in));
	    String st = s.readLine();
	    for(int i=st.length()-1; i>=0; i--)
		System.out.print(st.charAt(i));
	    System.out.println();
	}catch(Exception e){
	    System.out.println("Error");
	}
    }
}
/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