package gen;
  import edu.neu.ccs.demeter.Ident;
  import edu.neu.ccs.demeterf.*;
  import edu.neu.ccs.demeterf.control.EdgeControl;
  import java.io.FileInputStream;

  Main = <term> Term.

  Term: Num | Var | Mul | Add.
  Num = <n> int.
  Var = <id> Ident.
  Mul = "(*" <l> Term <r> Term ")".
  Add = "(+" <l> Term <r> Term ")".