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