import java.util.Scanner;

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

        double time1 = Double.parseDouble(scanner.nextLine());
        double time2 = Double.parseDouble(scanner.nextLine());
        double time3 = Double.parseDouble(scanner.nextLine());
        double needTime = Double.parseDouble(scanner.nextLine());

        double allCleanTime = (1 / (1 / time1 + 1 / time2 + 1 / time3)) + (0.15 * (1 / (1 / time1 + 1 / time2 + 1 / time3)));

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

        double time_left = needTime - allCleanTime;
        double nedostig = allCleanTime - needTime;

        if (time_left > 0) {
            System.out.print("Yes, there is a surprise - time left -> " + (int) ((Math.floor(time_left)))+" hours.");
        } else if (time_left < 0) {

            System.out.print("No, there isn't a surprise - shortage of time -> "+(int) ((Math.ceil(nedostig)))+" hours.");
        }
    }
}