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