prompt: Your task is to convert an English description into an ASCII tree format using this style:
  ```
  main
   +--java
   |   `--org
   |       `--gradle
   |           `--tooling
   |               `--internal
   |                   `--provider
   |                       `--runner
   `--resources
       `--META-INF
           `--services
  ```
  
  Convert this description:
  
  certs is a head directory that consolidates 3 subdirectories: expired, mtls and valid.
  In the root directory, 'expired' comprises 2 subdirectory elements: ca, server.
  Within directory hierarchy 'expired → ca', The 'ca' folder awaits content.
  In nested path 'expired > server', Inside 'server', you'll find it has nothing inside.
  Back to the top level.
  At the main level, 'mtls' possesses 1 nested folders: client.
  At level 2, in directory path 'mtls > client', 'client' incorporates 1 child directories: ca.
  In nested path 'mtls / client / ca', The 'ca' storage space is an empty container.
  At the main level, 'valid' includes 2 directories: ca, server.
  At level 2, in directory path 'valid / ca', Inside 'ca', you'll find it hasn't been filled with any content.
  In nested path 'valid / server', 'server' has yet to be populated.
  
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "certs\n +--expired\n |   +--ca\n |   `--server\n +--mtls\n |   `--client\n |       `--ca\n `--valid\n     +--ca\n     `--server", "description": "certs is a head directory that consolidates 3 subdirectories: expired, mtls and valid.\nIn the root directory, 'expired' comprises 2 subdirectory elements: ca, server.\nWithin directory hierarchy 'expired \u2192 ca', The 'ca' folder awaits content.\nIn nested path 'expired > server', Inside 'server', you'll find it has nothing inside.\nBack to the top level.\nAt the main level, 'mtls' possesses 1 nested folders: client.\nAt level 2, in directory path 'mtls > client', 'client' incorporates 1 child directories: ca.\nIn nested path 'mtls / client / ca', The 'ca' storage space is an empty container.\nAt the main level, 'valid' includes 2 directories: ca, server.\nAt level 2, in directory path 'valid / ca', Inside 'ca', you'll find it hasn't been filled with any content.\nIn nested path 'valid / server', 'server' has yet to be populated.\n"}