import java.util.*;
import java.io.*;
public class Main {
	Scanner sc;
	PrintWriter pw;
	public static void main(String... args) {
		Main m = new Main();
		m.solve();
		m.close();
	}
	public Main() {
		sc = new Scanner(System.in);
		pw = new PrintWriter(System.out);
	}
	private void close() {
		pw.flush();
		pw.close();
	}
	private void solve() {
		StringBuilder buf = new StringBuilder();
		char[] cr = sc.nextLine().toCharArray();
		for(int i = cr.length - 1; i > -1; i--)
			buf.append(cr[i]);
		pw.println(buf.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