import java.util.Scanner;

public class Exam1 {
    public static void main (String [] args){
        Scanner scanner = new Scanner(System.in);

        int width = Integer.parseInt(scanner.nextLine());
        int length = Integer.parseInt(scanner.nextLine());
        int heigth = Integer.parseInt(scanner.nextLine());
        int boxes = Integer.parseInt(scanner.nextLine());


        int freeSpace = width * length * heigth;

        while (freeSpace > boxes){
            int input = Integer.parseInt(scanner.nextLine());
            boxes += input;





            if ("Done".equals(input)){
                break;
            }
        }
        int diff = Math.abs(freeSpace - boxes);
        if (freeSpace > boxes){
            System.out.printf("%d Cubic meters left", diff);
        }else {
            System.out.printf("No more free space! You need %d Cubic meters more.", diff);
        }



    }
}