import java.io.*;
public class Main {
	public static void main(String[] args) throws java.io.IOException {
		BufferedReader input = new BufferedReader (new InputStreamReader (System.in));
		String str = input.readLine();
		int K = str.length();
		for(int a = K-1;a >= 0;a--){
			if(a==0){
				System.out.println(str.charAt(a));
			}else{
				System.out.print(str.charAt(a));
			}
		}
	}
}
/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