concrete GrammarHye of Grammar = 
  NounHye,
  VerbHye,
  AdjectiveHye,
  AdverbHye,
  NumeralHye,
  SentenceHye,
  QuestionHye,
  RelativeHye,
  ConjunctionHye,
  PhraseHye,
  StructuralHye,
  IdiomHye,
  TenseX,
  NamesHye ** {
}