text: import threading, os, time
  numbers = []
  def count(n:int)->None:
      global numbers
      for i in range(n):
          time.sleep(.2)
          numbers.append(i)
  
  A = threading.Thread(target=count, args=(5, ), name="Thread A")
  B = threading.Thread(target=count, name="Thread B", args=(5, ))
  A.start()
  B.start()
  print(threading.activeCount())