prompt: Your task is to convert an English description into an ASCII tree format using this style:
  ```
  tailwindcss
   +--src
   |   +--__snapshots__
   |   +--compat
   |   |   `--config
   |   +--source-maps
   |   +--test-utils
   |   `--utils
   `--tests
  ```
  
  Convert this description:
  
  input is a parent directory that holds 4 subdirectories. Notable ones include src, sub, sub-fallback among others.
  
  The project source code seems to be organized in the 'src' collection.
  
  Let me break down the framework for you:
  
  At the top level, 'src' has no folders inside.
  In the root directory, 'sub' is barren.
  At the top level, The 'sub-fallback' folder is devoid of content.
  At the top level, 'sub-nested' keeps 3 subdirectory elements: file1, file2, file3.
  At level 2, in directory path 'sub-nested / file1', Inside 'file1', you'll find it contains nothing at present.
  At level 2, in directory path 'sub-nested / file2', The 'file2' storage space is vacant.
  Within directory hierarchy 'sub-nested / file3', The 'file3' folder remains unused.
  
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "input\n +--src\n +--sub\n +--sub-fallback\n `--sub-nested\n     +--file1\n     +--file2\n     `--file3", "description": "input is a parent directory that holds 4 subdirectories. Notable ones include src, sub, sub-fallback among others.\n\nThe project source code seems to be organized in the 'src' collection.\n\nLet me break down the framework for you:\n\nAt the top level, 'src' has no folders inside.\nIn the root directory, 'sub' is barren.\nAt the top level, The 'sub-fallback' folder is devoid of content.\nAt the top level, 'sub-nested' keeps 3 subdirectory elements: file1, file2, file3.\nAt level 2, in directory path 'sub-nested / file1', Inside 'file1', you'll find it contains nothing at present.\nAt level 2, in directory path 'sub-nested / file2', The 'file2' storage space is vacant.\nWithin directory hierarchy 'sub-nested / file3', The 'file3' folder remains unused.\n"}