public class Vehicle2010 extends Vehicle
{
    void moveUpperRight()
    {
        x += 1;
        y += 1;
    }

    void moveUpperLeft()
    {
        x -= 1;
        y += 1;
    }

    void moveLowerRight()
    {
        x += 1;
        y -= 1;
    }

    void moveLowerLeft()
    {
        x -= 1;
        y -= 1;
    }

    public Boolean equals(Vehicle v)
    {
        if (x == v.x && y == v.y )
        {
            return true;
        }
        return false;
    }
}