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PPI::Document
  PPI::Statement::Compound
    PPI::Token::Label  	'BEGIN:'
    PPI::Token::Whitespace  	' '
    PPI::Structure::Block  	{ ... }
      PPI::Token::Whitespace  	' '
      PPI::Statement
        PPI::Token::Number  	'1'
        PPI::Token::Structure  	';'
      PPI::Token::Whitespace  	' '
  PPI::Token::Whitespace  	'\n'
  PPI::Statement::Compound
    PPI::Token::Label  	'BEGIN :'
    PPI::Token::Whitespace  	' '
    PPI::Structure::Block  	{ ... }
      PPI::Token::Whitespace  	' '
      PPI::Statement
        PPI::Token::Number  	'1'
        PPI::Token::Structure  	';'
      PPI::Token::Whitespace  	' '
  PPI::Token::Whitespace  	'\n'