import java.util.Scanner;

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

        int x = Integer.parseInt(scan.nextLine());
        double y = Double.parseDouble(scan.nextLine());
        int z = Integer.parseInt(scan.nextLine());
        int workers = Integer.parseInt(scan.nextLine());

        double grape = x * y;
        double forWine = (grape / 2.5) * 0.4;
        if (forWine >= z) {
            double left = (forWine - z);
            double winePerWorker = left / workers;
            System.out.printf("Good harvest this year! Total wine: %.0f liters.%n", Math.floor(forWine));
            System.out.printf("%.0f liters left -> %.0f liters per person.", Math.ceil(left), Math.ceil(winePerWorker));
        } else{
            double wineNeeded = z - forWine;
            System.out.printf("It will be a tough winter! More %.0f liters wine needed.", Math.floor(wineNeeded));
        }
    }
}