[ capword sp & sp capword ( ) ] sp capword , sp caplet . sp & sp capword , sp caplet . sp caplet . sp ( ) . sp capword sp othword sp othword sp othword sp othword othword sp othword sp othword . sp othword . sp upword sp othword : / / othword . othword . othword . othword / othword / othword othword num . num . num . num . num & othword othword & othword othword .