(Program
{-(Hash
    (KeyValue
      (Identifier)
      (Integer)))-}
  (Hash)
{+(Hash
    (KeyValue
      (Identifier)
      (Integer)))+}
{+(Hash
    (KeyValue
      (Identifier)
      (Identifier))
    (KeyValue
      (Identifier)
      (Identifier)))+}
{-(Assignment
    (Identifier)
    (Hash
      (Comment)
      (KeyValue
        (Identifier)
        (Identifier))
      (KeyValue
        (Identifier)
        (Identifier))))-})