generators.ET0LTreeGrammar("ET0L version"):
( { S },
  { line:0, start:3, div:3, c1:1, c2:1, c3:1 },
  {
   { S -> div[S,S,S] },
   { S -> line }
  },
  start[c1[S],c2[S],c3[S]] )
