public string Get()
        {
            string current_variable = "";

            lock (locker)
            {
                current_variable = variable;
                Monitor.PulseAll(locker);
            }



            return current_variable;

        }

        public void Put(string i)
        {
            lock (locker)
            {
                while (variable.Count(x => x == 'A') < 3 && i != "A")
                {


                    Monitor.Wait(locker);

                    if (isDone == true)
                    {
                        return;
                    }
                }
                variable = variable + i;

                Monitor.PulseAll(locker);

            }
        }