using System;

public class Program

{

    public static void Main()

    {

        //initialize powertrain with power 3

        int power = 3;

        Powertrain powertrain = new Powertrain(power);

        int wheels = 4;

        //initialize hassis with the powertrain instance, along with 4 wheels

        Chassis chassis = new Chassis(powertrain, wheels);

        //initialize vehicle with the chassis, which had setup powertrain

        Vehicle vehicle = new Vehicle(chassis);

        //finally accelerate vehicle

        vehicle.Accelerate(power);

    }

    //class representing vehicle, which will take chassis as an input to constructor and execute its Accelerate method  which in turn calls the Chassis's Move method to cause disposition

    public class Vehicle

    {

        private Chassis _chassis;

        //if needed, we can expose chassis as public property

        //public Chassis Chassis {get; private set;}

        public Vehicle(Chassis chassis)

        {

            _chassis = chassis; 

        }

        //Accelerate the chassis, with provided power

        public void Accelerate(int power)

        {

            _chassis.MoveWheels(power);

        }       

    }

    //Represents Chassis which will take a powertrain instance and wheels count

    public class Chassis

    {

        private int _wheels;

        private Powertrain _powertrain;

        //public constructor which initializes powertrain and wheels of the chassis

        public Chassis(Powertrain powertrain, int wheelsCount)

        {

            _powertrain = powertrain;

            _wheels = wheelsCount;

        }

        //Method which trigger movement of the chassis, in turn moving the vehicle

        public void MoveWheels(int power)

        {

            Console.WriteLine($"Accelerate vehicle distance {_powertrain.Power}");

        }

    }

    //Represents powertrain which takes power as an input via constructor and cause acceleration

    public class Powertrain

    {       

        private int _power;

        public int Power { 

            get 

            {

                return _power;

            } 

            private set 

            {

                _power = value; 

            }

        } 

        public Powertrain(int power)

        {

            Power = power;

        }

    }

}