 
<translate> Passage: Za a gudanar da zaben majalisar dattijan Amurka a ranar 6 ga Nuwamba, 2018, tare da kujeru 33 daga cikin kujeru 100 a majalisar dattijai da ake takara a zaben yau da kullun. Wadanda suka yi nasara za su yi aiki na shekaru shida daga Janairu 3, 2019, zuwa Janairu 3, 2025. A halin yanzu, 'yan Democrat suna da kujeru 23 da za a yi zabe tare da' yanci 2 da ke tare da su. 'Yan Republican suna da kujeru 8 da za a zaɓa. Biyu daga cikin kujerun 'yan Republican sun kasance a buɗe sakamakon Sanata Bob Corker na Tennessee da Sanata Jeff Flake na Arizona da ke jiran ritaya. Kujerun da aka zaba a shekarar 2018 sun kasance na karshe don za ~ e a shekarar 2012, kodayake wasu kujeru na iya samun za ~ en na musamman idan masu zama sun mutu ko sun yi murabus, kamar yadda ya riga ya faru a Alabama da Minnesota. Bayan zaben 2016, wasu jami'an zabe na jihohi suna kokarin inganta tsarin zabe a lokacin wannan zaben.  Tambaya: Bisa ga wannan nassi, kujeru nawa ne na majalisar dattawa da za a yi zabe a 2018? 33 da kuma <eng> Passage: Elections to the United States Senate will be held November 6, 2018, with 33 of the 100 seats in the Senate being contested in regular elections. The winners will serve six-year terms from January 3, 2019, to January 3, 2025. Currently, Democrats have 23 seats up for election along with 2 independents who caucus with them. Republicans have 8 seats up for election. Two of the Republican seats are open as a result of Tennessee Senator Bob Corker's and Arizona Senator Jeff Flake's pending retirements. The seats up for election in 2018 were last up for election in 2012, although some seats may have special elections if incumbents die or resign, as has already happened in Alabama and Minnesota. After the 2016 elections, some state election officials are trying to upgrade voting systems in time for this election.

Question: Based on this passage, how many senate seats are up for election in 2018?
33 