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

class Main{
    public static void main (String args[]) {
		try {
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			String line = br.readLine();
			
			if (line.length() <= 20 && line.length() > 0) {
				char[] str = line.toCharArray();
				for (int i = str.length-1; i >= 0; i--) {
					System.out.print(str[i]);
				}
			}else{
				System.exit(0);
			}
			System.out.println("");
			System.exit(0);
		}
		catch (IOException e) {
			e.printStackTrace();
		}	
    }
}
/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