prompt: Your task is to convert an English description into an ASCII tree format using this style:
  ```
  [lang]
   +--@modal
   |   +--(.)feed
   |   `--(.)photos
   |       `--[id]
   +--feed
   `--photos
       `--[id]
  ```
  
  Convert this description:
  
  guide is a origin directory that maintains 3 subdirectories: advanced, concepts and getting-started.
  In the root directory, 'advanced' carries 3 contained folders: fixed-layout, free-layout, variable.
  At level 2, in directory path 'advanced > fixed-layout', Inside 'fixed-layout', you'll find it is currently empty.
  In nested path 'advanced → free-layout', 'free-layout' has been left empty.
  Within directory hierarchy 'advanced / variable', The 'variable' data structure is unpopulated.
  Back to the top level.
  At the top level, The 'concepts' data structure is devoid of content.
  At the main level, Inside 'getting-started', you'll find it has no folders inside.
  
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "guide\n +--advanced\n |   +--fixed-layout\n |   +--free-layout\n |   `--variable\n +--concepts\n `--getting-started", "description": "guide is a origin directory that maintains 3 subdirectories: advanced, concepts and getting-started.\nIn the root directory, 'advanced' carries 3 contained folders: fixed-layout, free-layout, variable.\nAt level 2, in directory path 'advanced > fixed-layout', Inside 'fixed-layout', you'll find it is currently empty.\nIn nested path 'advanced \u2192 free-layout', 'free-layout' has been left empty.\nWithin directory hierarchy 'advanced / variable', The 'variable' data structure is unpopulated.\nBack to the top level.\nAt the top level, The 'concepts' data structure is devoid of content.\nAt the main level, Inside 'getting-started', you'll find it has no folders inside.\n"}