Complex Ternary condition

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Numerics;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            //First case
            Console.WriteLine("first: null; second: \"aa\"");
            string first = null;
            string second = "aa";
            string matrixNullMessage = first == null ? " first" + (second==null?" and second matrices ":" matrix ") :
                "" + (second==null?" second matrix ":"");

            string message = "The" + matrixNullMessage + "not initialised.";
            Console.WriteLine(message + "\n");

            //Second case
            Console.WriteLine("first: null; second: null");
            first = null;
            second = null;
            matrixNullMessage = first == null ? " first" + (second == null ? " and second matrices " : " matrix ") :
                "" + (second == null ? " second matrix " : "");

            message = "The" + matrixNullMessage + "not initialised.";
            Console.WriteLine(message+"\n");

            //Third case
            Console.WriteLine("first: \"aa\"; second: null");
            first = "aa";
            second = null;
            matrixNullMessage = first == null ? " first" + (second == null ? " and second matrices " : " matrix ") :
                "" + (second == null ? " second matrix " : "");

            message = "The" + matrixNullMessage + "not initialised.";
            Console.WriteLine(message + "\n");
        }
    }
}