prompt: Your task is to convert an English description into an ASCII tree format using this style:
  ```
  src
   +--components
   +--images
   `--pages
       +--images
       `--static-images
  ```
  
  Convert this description:
  
  service-worker is a top-level directory that includes 2 subdirectories: a and b.
  At the top level, 'a' is currently empty.
  At the main level, 'b' possesses 1 folders: nested.
  In nested path 'b → nested', Inside 'nested', you'll find it sits empty.
  
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "service-worker\n +--a\n `--b\n     `--nested", "description": "service-worker is a top-level directory that includes 2 subdirectories: a and b.\nAt the top level, 'a' is currently empty.\nAt the main level, 'b' possesses 1 folders: nested.\nIn nested path 'b \u2192 nested', Inside 'nested', you'll find it sits empty.\n"}