package saeed;
import java.lang.*;

 interface Vehicle
{
	public double speed();
	public  int isRunning();

}

 class Land implements Vehicle
 {
	 double spd=100;
	 int running;
	 public double speed()
	 {
		 return spd;
	 }
	 public  int isRunning()
	 {
		 return running;
	 }
 }

 class Water implements Vehicle
 {
	 double spd;
	 int running;
	 public double speed()
	 {
		 return spd;
	 }
	 public  int isRunning()
	 {
		 return running;
	 }
 }

 class Air implements Vehicle
 {
	 double spd;
	 int running;
	 public double speed()
	 {
		 return spd;
	 }
	 public  int isRunning()
	 {
		 return running;
	 }
 }

 class Car extends Land
 {
	 public double speed()
	 { System.out.println("car speed "+spd);
		 return 50;}
	 public double superspeed()
	 {
		 return super.speed();
	 }
 }

 class Bus extends Land
 {

 }

 class Ship extends Water
 {

 }

 class Boat extends Water
 {

 }

 class Plane extends Air
 {

 }

 class Heli extends Air
 {

 }
public class main {
	Land landV = new Land();
	Car audi =new Car();
	{


	try
	{
		 System.out.println("audi is instance od land");
	}
	catch (Exception e )
	{
		System.out.println("exception");
	}

	System.out.println(audi.speed());
	System.out.println(audi.superspeed());
}}