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

class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner in = new Scanner(System.in);
		String c = in.nextLine();
        for (int i=c.length()-1; i >= 0; i--) {
            System.out.print(c.charAt(i));
        }
	}
}