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