import java.util.Scanner;
public class FuelTank {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
// input
String fueltype = scanner.nextLine();
int litres = Integer.parseInt(scanner.nextLine());
if (fueltype.equals("Diesel") || fueltype.equals("Gasoline") || fueltype.equals("Gas")) {
if (litres >= 25) {
System.out.println("You have enough " + fueltype.toLowerCase() + ".");
} else if (litres < 25) {
System.out.println("Fill your tank with " + fueltype.toLowerCase()+ "!");
}
} else System.out.println("Invalid fuel!");
}
}