generators.ET0LTreeGrammar:
( { S, A, B, C, D },
  { E:5, F:9, G:5, H:3, I:3, J:4, K:1, sq:0 },
  {
    {
      S -> F[A,S,A,S,S,S,A,S,A],
      A -> G[B,B,C,B,C],
      B -> I[B,B,B],
      C -> J[B,D,C,B],
      D -> H[B,D,B]
    },
    {
      S -> sq,
      A -> sq,
      B -> sq,
      C -> sq,
      D -> sq
    }
  },
  E[K[C],K[C],F[A,S,A,S,S,S,A,S,A],K[C],K[C]]
)
