prompt: Your task is to convert the following English description into an ASCII tree format.
  
  src is a head directory that includes 2 subdirectories: foo and main.
  At the main level, 'foo' possesses 1 child directories: widgets.
  Within directory hierarchy 'foo → widgets', Inside 'widgets', you'll find it hasn't been filled with any content.
  At the top level, 'main' bundles 1 folders: widgets.
  At level 2, in directory path 'main → widgets', Inside 'widgets', you'll find it is vacant.
  Back to the top level.
  
  
  Format your response in this style:
  ```
  contrib
   +--admin
   |   `--_images
   +--gis
   |   `--install
   `--postgres
  ```
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "src\n +--foo\n |   `--widgets\n `--main\n     `--widgets", "description": "src is a head directory that includes 2 subdirectories: foo and main.\nAt the main level, 'foo' possesses 1 child directories: widgets.\nWithin directory hierarchy 'foo \u2192 widgets', Inside 'widgets', you'll find it hasn't been filled with any content.\nAt the top level, 'main' bundles 1 folders: widgets.\nAt level 2, in directory path 'main \u2192 widgets', Inside 'widgets', you'll find it is vacant.\nBack to the top level.\n"}