prompt: Your task is to convert the following English description into an ASCII tree format.
  
  app is a master directory that organizes 2 subdirectories: api and preview-page.
  In the root directory, 'api' encapsulates 2 directories: disable-draft, draft.
  Within directory hierarchy 'api → disable-draft', 'disable-draft' holds no subdirectories at the moment.
  At level 2, in directory path 'api → draft', The 'draft' folder has been left empty.
  Back to the top level.
  At the main level, Inside 'preview-page', you'll find it is barren.
  
  
  Format your response in this style:
  ```
  gradle
   +--api
   +--internal
   `--util
       `--internal
  ```
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "app\n +--api\n |   +--disable-draft\n |   `--draft\n `--preview-page", "description": "app is a master directory that organizes 2 subdirectories: api and preview-page.\nIn the root directory, 'api' encapsulates 2 directories: disable-draft, draft.\nWithin directory hierarchy 'api \u2192 disable-draft', 'disable-draft' holds no subdirectories at the moment.\nAt level 2, in directory path 'api \u2192 draft', The 'draft' folder has been left empty.\nBack to the top level.\nAt the main level, Inside 'preview-page', you'll find it is barren.\n"}