[ num ] sp num othword sp upword sp capword sp capword sp othword sp capword , sp upword sp year , sp capword sp num sp - sp capword sp num , sp year capword , sp upword , sp capword sp [ capword ] . sp — sp [ caplet . sp smallet . ] sp : sp upword , sp year . sp — sp upword : sp othword : / / othword . othword . othword / othword / othword / num / othword .