import java.util.Scanner;
public class Main{
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int in=sc.nextInt();
        String s=in+"";
        char[] c = s.toCharArray();
        for (int i = c.length-1; i>=0; i--) {
            System.out.print(c[i]);
        }
    }
}