prompt: Your task is to convert an English description into an ASCII tree format using this style:
  ```
  plumbing
   +--cache
   +--color
   +--filemode
   +--format
   |   +--config
   |   +--diff
   |   +--gitignore
   |   +--idxfile
   |   +--index
   |   +--objfile
   |   +--packfile
   |   `--pktline
   +--hash
   +--object
   +--protocol
   |   `--packp
   |       +--capability
   |       `--sideband
   +--revlist
   +--storer
  ```
  
  Convert this description:
  
  basic is a main directory that collects 2 subdirectories: app and utils.
  At the top level, 'app' maintains 1 subdirectories that organize the source code.
  Within directory hierarchy 'app → invalid-in-client', The 'invalid-in-client' data structure is unpopulated.
  At the top level, 'utils' appears to be unused.
  
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "basic\n +--app\n |   `--invalid-in-client\n `--utils", "description": "basic is a main directory that collects 2 subdirectories: app and utils.\nAt the top level, 'app' maintains 1 subdirectories that organize the source code.\nWithin directory hierarchy 'app \u2192 invalid-in-client', The 'invalid-in-client' data structure is unpopulated.\nAt the top level, 'utils' appears to be unused.\n"}