prompt: Your task is to convert the following English description into an ASCII tree format.
  
  api is a main directory that contains 2 subdirectories: alembic and app.
  At the main level, 'alembic' contains 1 directory entries: versions.
  Within directory hierarchy 'alembic > versions', The 'versions' section is empty.
  At the top level, The 'app' directory shelters 2 folders for code organization.
  In nested path 'app / routers', 'routers' remains unused.
  Within directory hierarchy 'app → utils', Inside 'utils', you'll find it is devoid of content.
  
  
  Format your response in this style:
  ```
  docs
   +--about
   +--advanced
   +--deployment
   +--how-to
   +--learn
   +--resources
   +--security
   `--tutorial
       +--dependencies
       `--security
  ```
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "api\n +--alembic\n |   `--versions\n `--app\n     +--routers\n     `--utils", "description": "api is a main directory that contains 2 subdirectories: alembic and app.\nAt the main level, 'alembic' contains 1 directory entries: versions.\nWithin directory hierarchy 'alembic > versions', The 'versions' section is empty.\nAt the top level, The 'app' directory shelters 2 folders for code organization.\nIn nested path 'app / routers', 'routers' remains unused.\nWithin directory hierarchy 'app \u2192 utils', Inside 'utils', you'll find it is devoid of content.\n"}