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

// The main method must be in a class named "Main".
class Main {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        if(n%7==0 || n%10==7) System.out.print("Buzz Number");
        else System.out.print("Not Buzz Number");
    }
}