anchor.diff:  // exit statement
   
   exitStatement :
  -	exitStatementFormat1 | exitStatementFormat2
  -;
  -
  -exitStatementFormat1 :
  -	EXIT
  -;
  -
  -exitStatementFormat2 :
  -	EXIT PROGRAM
  +	EXIT PROGRAM?
   ;
   
   // generate statement
  
positive.code: ;
  
  sendStatementAsync :
  	SEND TO (TOP | BOTTOM) identifier
  	onExceptionClause?
  	notOnExceptionClause?
  ;
  
negative.code: // multiply statement
  
  multiplyStatement :
  	MULTIPLY (identifier | literal) BY
  	(
  		multiplyRegular
  		| multiplyGiving
  