import java.util.Scanner;

public class ThreeBrothers {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        double a = Double.parseDouble(scanner.nextLine());
        double b = Double.parseDouble(scanner.nextLine());
        double c = Double.parseDouble(scanner.nextLine());
        double d = Double.parseDouble(scanner.nextLine());

        double cleaningTime = 1/(1/a + 1/b + 1/c);
        double timeAndBreak = cleaningTime + (cleaningTime*0.15);
        double hoursLeft = d - timeAndBreak;

        System.out.printf("Cleaning time: %.2f%n", timeAndBreak);

        if (hoursLeft > 0) {
            System.out.printf("Yes, there is a surprise - time left -> %.0f hours.", Math.floor(hoursLeft));
        } else if (hoursLeft <= 0){
            System.out.printf("No, there isn't a surprise - shortage of time -> %.0f hours.", Math.abs(Math.floor(hoursLeft)));
        }
    }
}