prompt: Your task is to convert the following English description into an ASCII tree format.
  
  src is a central directory that comprises 2 subdirectories: ast_nodes and convert_ast.
  At the top level, 'ast_nodes' encompasses 1 folders: shared.
  Within directory hierarchy 'ast_nodes / shared', The 'shared' repository hasn't been filled with any content.
  Back to the top level.
  In the root directory, 'convert_ast' incorporates 1 nested folders: converter.
  At level 2, in directory path 'convert_ast > converter', The 'converter' container is barren.
  
  
  Format your response in this style:
  ```
  main
   +--java
   |   `--org
   |       `--gradle
   |           `--sample
   `--webapp
  ```
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "src\n +--ast_nodes\n |   `--shared\n `--convert_ast\n     `--converter", "description": "src is a central directory that comprises 2 subdirectories: ast_nodes and convert_ast.\nAt the top level, 'ast_nodes' encompasses 1 folders: shared.\nWithin directory hierarchy 'ast_nodes / shared', The 'shared' repository hasn't been filled with any content.\nBack to the top level.\nIn the root directory, 'convert_ast' incorporates 1 nested folders: converter.\nAt level 2, in directory path 'convert_ast > converter', The 'converter' container is barren.\n"}