prompt: Your task is to convert the following English description into an ASCII tree format.
  
  bigger_applications is a root directory that includes 3 subdirectories: app, app_an and app_an_py39.
  In the root directory, 'app' hosts 2 subdirectories that organize the source code.
  At level 2, in directory path 'app / internal', 'internal' has no content.
  In nested path 'app > routers', The 'routers' data structure holds no subdirectories at the moment.
  At the top level, 'app_an' organizes 2 folders: internal, routers.
  Within directory hierarchy 'app_an / internal', Inside 'internal', you'll find it contains no subdirectories.
  At level 2, in directory path 'app_an / routers', The 'routers' container is an empty container.
  At the top level, 'app_an_py39' features 2 subdirectories: internal, routers.
  In nested path 'app_an_py39 → internal', The 'internal' storage space holds no subdirectories at the moment.
  Within directory hierarchy 'app_an_py39 → routers', Inside 'routers', you'll find it is blank.
  Back to the top level.
  
  
  Format your response in this style:
  ```
  gradle
   +--api
   |   `--plugins
   |       `--catalog
   |           `--internal
   `--catalog
  ```
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "bigger_applications\n +--app\n |   +--internal\n |   `--routers\n +--app_an\n |   +--internal\n |   `--routers\n `--app_an_py39\n     +--internal\n     `--routers", "description": "bigger_applications is a root directory that includes 3 subdirectories: app, app_an and app_an_py39.\nIn the root directory, 'app' hosts 2 subdirectories that organize the source code.\nAt level 2, in directory path 'app / internal', 'internal' has no content.\nIn nested path 'app > routers', The 'routers' data structure holds no subdirectories at the moment.\nAt the top level, 'app_an' organizes 2 folders: internal, routers.\nWithin directory hierarchy 'app_an / internal', Inside 'internal', you'll find it contains no subdirectories.\nAt level 2, in directory path 'app_an / routers', The 'routers' container is an empty container.\nAt the top level, 'app_an_py39' features 2 subdirectories: internal, routers.\nIn nested path 'app_an_py39 \u2192 internal', The 'internal' storage space holds no subdirectories at the moment.\nWithin directory hierarchy 'app_an_py39 \u2192 routers', Inside 'routers', you'll find it is blank.\nBack to the top level.\n"}