import java.util.Scanner;

public class P02Safari {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        double budget = Double.parseDouble(scanner.nextLine());
        double litersFuel = Double.parseDouble(scanner.nextLine());
        String day = scanner.nextLine(); // "Saturday","Sunday"


        double priceFuel = litersFuel * 2.10;
        double totalGuide = priceFuel + 100;
        double discount = 0;

                switch (day){
            case "Sunday":
                discount = totalGuide - 20.0/100;
            case "Saturday":
                 discount = totalGuide * 0.90;
        }

        if(budget >= discount ){
            System.out.printf("Safari time! Money left: %.2f lv.",Math.abs(budget - discount));
        }else {
            System.out.printf("Not enough money! Money needed: %.2f lv.",Math.abs(discount - budget));
        }
    }
}