workers

using System;
using System.Collections.Generic;

    public class Worker
    {

        public string FirstName {get;set;}

        public string LastName {get;set;}

        public int Id{get;set;}

        public int WorkerIdentifier{get;set;}

        public char Gender {get;set;}

    }
public class Program
{
    public static void Main()
    {
    List<Worker>firmWorkers=new List<Worker>();

        string input=string.Empty;

        while((input=Console.ReadLine())!="end")
        {
            string[] tokens= input.Split();

            string firstname=tokens[0];
            string lastname=tokens[1];
            int id =int.Parse(tokens[2]);
            int workerIdentifier=int.Parse(tokens[3]);
            char gender=char.Parse(tokens[4]);

            bool genderIsCorrect= gender=='F' || gender=='M';
            bool IndentifierIsCorrect= workerIdentifier>=27560000 && workerIdentifier<=27569999;

            if(!genderIsCorrect)
            {
                Console.WriteLine("not correct gender given");
                continue;
            }
            if(!IndentifierIsCorrect)
            {
                Console.WriteLine("not correct identifier number given! Must be between 27560000 and 27569999");
                continue;
            }
            Worker worker=new Worker
            {
                FirstName=firstname,
                LastName=lastname,
                Id=id,
                WorkerIdentifier=workerIdentifier,
                Gender=gender
            };

            firmWorkers.Add(worker);
        }

        foreach(var w in firmWorkers)
        {
            Console.WriteLine($"{w.FirstName} {w.LastName}")
        }
    }
}