package com.company;


        import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        // write your code hereS
        Scanner sc = new Scanner(System.in);
       double neededMoney = Double.parseDouble(sc.nextLine());
       int countMonths = Integer.parseInt(sc.nextLine());
       double savedMoney = 0;
        for (int i = 1; i <=12 ; i++) {

            if (i%2==1&&i!=1){
                double spentMoney = savedMoney*0.16;
                savedMoney=savedMoney-spentMoney;
            }else if (i%4==0){
                double bonus = savedMoney*0.25;
                savedMoney=savedMoney+bonus;
            }
            savedMoney=savedMoney+0.25*neededMoney;
            if (savedMoney>=neededMoney){
                break;
            }
        }
        if (savedMoney>=neededMoney){
            System.out.printf("Bravo! You can go to Disneyland and you will have %.2flv. for souvenirs.",savedMoney-neededMoney);
        }else{
            System.out.printf("Sorry. You need %.2flv. more.", neededMoney-savedMoney);
        }
    }
}