using System;
using System.Collections.Generic;
using System.Text;

public  class Engine
{
    private string model;
    private int power;
    private int displacement;
    private string efficiency;

    public Engine()
    {

    }
    public Engine(string model, int power)
    {
        this.Model = model;
        this.Power = power;
    }

    public Engine(int displacement) : this()
    {
        this.Displacement = displacement;
    }

    public Engine(string efficiency) : this(model, power)
    {
        this.Efficiency = efficiency;
    }

    public string Efficiency
    {
        get { return efficiency; }
        set { efficiency = value; }
    }


    public int Displacement
    {
        get { return displacement; }
        set { displacement = value; }
    }


    public int Power
    {
        get { return power; }
        set { power = value; }
    }


    public string Model
    {
        get { return model; }
        set { model = value; }
    }

}