prompt: Your task is to convert the following English description into an ASCII tree format.
  
  system is a head directory that includes 2 subdirectories: module-a and module-b.
  At the top level, 'module-a' carries 1 directories: v1.
  Within directory hierarchy 'module-a > v1', The 'v1' section has been left empty.
  At the top level, 'module-b' includes 1 nested folders: v1.
  Within directory hierarchy 'module-b / v1', The 'v1' container stands empty.
  Back to the top level.
  
  
  Format your response in this style:
  ```
  go-winio
   +--internal
   |   +--fs
   |   +--socket
   |   `--stringbuffer
   `--pkg
       `--guid
  ```
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "system\n +--module-a\n |   `--v1\n `--module-b\n     `--v1", "description": "system is a head directory that includes 2 subdirectories: module-a and module-b.\nAt the top level, 'module-a' carries 1 directories: v1.\nWithin directory hierarchy 'module-a > v1', The 'v1' section has been left empty.\nAt the top level, 'module-b' includes 1 nested folders: v1.\nWithin directory hierarchy 'module-b / v1', The 'v1' container stands empty.\nBack to the top level.\n"}