using System;
using System.Collections;
using System.Collections.Generic;
class Program
    {
        static void Main(string[] args)
        {
         LandVehicle obj=new LandVehicle();
         Console.ReadLine();
        }
    }class Vehicle
    {
    	public Vehicle()
    	{Console.WriteLine("Base");
    	}public Vehicle(string param)
    	{Console.WriteLine("param");
    	}
    }class LandVehicle:Vehicle
    {public LandVehicle():base("I am a different constructor")
    {Console.WriteLine("derived");
    }
    }

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