import java.util.Scanner;

public class No9006 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();

        String result = "";

        for (int i = s.length() - 1; i >= 0; i--) {
            result += s.charAt(i);
        }

        System.out.println(result);

        sc.close();
    }

}