import java.util.Arrays;
import java.util.Scanner;
public class sort{
    public static void main(String[] args){
        Scanner stdIn = new Scanner(System.in);
        int i;
        int n = stdIn.nextInt();
        for(i = 1; i<=n; i++){
            System.out.print((i % 3 > 0 ? "":"Fizz") + (i % 5 > 0 ? (i % 3 > 0 ? i :""):"Buzz"));
        }
        stdIn.close();
    }
}