PARSER_BEGIN(Adder)
class Adder{
         static void main(String args[]) throws ParseException, 
TokenMgrError
         {
                 Adder parser=new Adder(System.in);
                 int val = parser.Start() ;
		 System.out.println(val);
         }
}
PARSER_END(Adder)


SKIP:{" "}
SKIP:{"\n"|"\r"|"\r\n"}
TOKEN:{<PLUS:"+">}
TOKEN:{<NUMBER:(["0"-"9"])+>}

int Start() throws NumberFormatException :
{
	Token t ;
	int i ;
	int value ;
}
{
	t = <NUMBER>
	{ i = Integer.parseInt( t.image ) ; }
	{ value = i ; } 
	(
		<PLUS>
		t = <NUMBER>
		{ i = Integer.parseInt( t.image ) ; }
		{ value += i ; }
	)*
	<EOF>
	{ return value ; }
}