concrete GrammarFao of Grammar =
  TenseX,
  PhraseFao,
  NounFao,
  VerbFao,
  AdjectiveFao,
  AdverbFao,
  NumeralFao,
  SentenceFao,
  QuestionFao,
  RelativeFao,
  ConjunctionFao,
  StructuralFao,
  IdiomFao,
  NamesFao ** {
}