text: from Defer import Defer
  with Defer() as defer:
      print("enter the room")
      defer(lambda: print("leave the room"))
  
      print("prepare printer")
      defer(lambda: print("close printer"))
  
      print("start printing")
      defer(lambda: print("end printing"))
  
      print(3)
      print(4)
      print(5)
      print("LONG LONG TASKS")
  