text: //jshint esversion:6
  /*this file defines a grammar, in terms of an object:
  {
    <name1>: [
      <exp1>,
      <exp2>,
      ...
    ],
    <name2>: [
      ...
    ], ...
  }*/
  
  export var grammar = {
    "S": ["aSa","aa"]
  };
  