using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var obj = (List<string>)null;

        var obj2 = new List<string>();

        Console.WriteLine("A" + obj != null ? "B" : "" + obj2 != null ? "C" : "");

        Console.WriteLine("A" + (obj != null ? "B" : "" + obj2 != null ? "C" : ""));

        Console.WriteLine("A" + (obj != null ? "B" : "") + (obj2 != null ? "C" : ""));

    }

}