class Mountain_Bike  extends Bicycle
{
	int seatheight;

	public Mountain_Bike(int speed,int gear,int height)
	{
	super(speed,gear);
	seatheight=height;
	}
	public String toString()
	{
		return super.toString()+ "seatheight"+ seatheight;// to call parent class(super.toString)
	}

}