CARS

public abstract class Cars {
	private String brand;
	private int nbSeats;
	private int nbDoors;
	private int speed;
	private String color;
	private Engine engine;

	public Car(String brand, int nbSeats, int nbDoors, int speed, String color, Engine engine)
	{
		this.brand = brand;
		this.nbSeats = nbSeats;
		this.nbDoors = nbDoors;
		this.speed = speed;
		this.color=color;
		this.engine=engine;
	}

	public String toString(){
		return  this.brand + this.nbSeats+ this.nbDoors +this.speed+ this.engine;
	}
}

class Engine {
	private int power;
	private int maxTorque;

	public Engine(double power, int maxTorque){
		this.power=power;
		this.maxTorque= maxTorque;

	}

	public String toString(){
		return " "+ this.power + this.maxTorque;
	}
}

class PetrolEngine extends Engine{
	private boolean hasCat;

	public PetrolEngine(int maxTorque, int power, boolean hasCat){
		super(maxTorque,power);
		this.hasCat=hasCat;
	}

	public boolean hasCatalyst(){
		return this.hasCat;
	}
}

class DieselEngine extends Engine{
	public String toString(){
		return "Diesel engine";
	}
}

class SUV extends Cars{
	private boolean suv4x4;
	private boolean gndClearance = true;

	public boolean is4x4(){
		return this.suv4x4;
	}

}

class NormalCars extends Cars{
	public String toString(){
		return "Normal car";
	}

}