import java.util.Scanner;

public class Playground {

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

        double brotherOneTime = Double.parseDouble(scanner.nextLine());
        double brotherTwoTime = Double.parseDouble(scanner.nextLine());
        double brotherThreeTime = Double.parseDouble(scanner.nextLine());
        double fatherAbsentTime = Double.parseDouble(scanner.nextLine());

        double cleaningTime = (1.0 / (1.0 / brotherOneTime + 1.0 / brotherTwoTime + 1.0 / brotherThreeTime)) * 1.15;

        double timeLeft = fatherAbsentTime - cleaningTime;

        if (timeLeft >= 0.0) {
            System.out.printf("Cleaning time: %.2f%nYes, there is a surprise - time left -> %.0f hours.", cleaningTime, Math.floor(timeLeft));
        } else {
            System.out.printf("Cleaning time: %.2f%nNo, there isn't a surprise - shortage of time -> %.0f hours.", cleaningTime, Math.ceil(-timeLeft));
        }
    }
}