-ous cccc cccs cccu cccv ccoc ccrc ccrs ccss ccuc ccus ccvo ccvs ckck ckco ckcs ckcv ckoc ckoo ckor ckos ckrc ckso ckvo cock coco cocu cok- coko cook coos cor- corc cork coro corr cors cosc coso coss couk cour cous covo crcc crcr crkc croc crok croo cror crss cruk crus cscc csco cscr cscs csks csor csos csrc csrs cssr csur csus cucc cuck cuk- curo curr curs cusk cuso cuss cusu cvcc cvrr cvss k-os kccc kcck kccr kccu kccv kckc kckk kcko kckr kckv kcor kcos kcou kcrc kcro kcrr kcrs kcru kcrv kcsc kcsr kcss kcsu kcuk kcvk kcvo kcvr kcvs kcvu kcvv kkck kkco kkcr kkcs kkkk kkoo kkor kkov kkrc kkrk kkro kkrr kkrs kkrv kksr kkss kksu kkus kkuu kkvr kkvu kkvv kock kocs kokc kokk koko kokr koks koku kooc kook kooo koor koos koou koov korc kork koro korr kors koru korv kos- kosc koso kosr koss kosu kour kous kouu kovc kovk kovo kovr krcc krco krcs krcu krkc krkk krko krkr krks krku krkv kroc krok kroo kror kros krov krrc krrk krro krrr krrs krsc krsk krsr krss krsu krsv kruc kruk krur krvc krvk krvo krvr krvs krvv ksck ksco kscr kscs kscu kscv kskk ksko kskr ksks ksku ksoc ksok ksoo ksor ksos ksou ksro ksrr ksrs ksrv ksso kssr ksss kssu ksuu ksvc ksvr ksvu kucc kuco kucr kucv kukk kuks kuku kuok kuoo kuos kurk kuro kurr kurs kuru kurv kusc kuso kusu kuuk kuur kuuu kuvo kuvr kvcc kvck kvco kvcr kvcs kvcu kvcv kvoc kvok kvoo kvor kvou kvov kvrc kvro kvrr kvrv kvsc kvso kvsr kvss kvsv kvuu kvvr kvvs kvvv occc ocks ocos ocro ocrr ocrs ocur okcu okko okok okor okro okso okur okus oocr ooku oooo ooos oous orco orcs orko oro- orok oror oros orro orrs orsk orso orsu orus orvr orvs oscc osco osku osoo osor osos osov osro osso ossu oucc our- ouro ours ouu- ovcs ovo- ovoo rccc rccs rcos rcsc rcss rcuv rcvr rcvs rkos rkss rksv rocc rock roco rocs rokk roko rokr roks roku rook roor roos rorc rork roro roru rosc roso ross rouk rous rovo rovs rrrr rscc rscs rsos ruck rukk ruku ruok rurc ruro rurs ruru rusk ruso russ rusu ruvu rv-c s-os sccc sccs sck- scok scoo scor scr- scrc scrs scsc scso scsr scsu scur skor skov skss skur sock soco socr socs sokk soko soku sook soor soos soro sorr sors soru soso soss sosv souk sour sous sovo sovs sovu srcc sros sscc sscs ssoc ssrc ssrs sssc ssss suc- succ suck sucr sucs suks suku suor suos sur- surc suro surr surs suru surv sus- susk suso suss susu suus suvs svcc svcs svor svsc ucos ucrc ucsc ucsu ukcc ukko ukok ukrc uksc ukur uocc uor- uovo uro- urok uroo urso urss ursu uruk urur urus us-k uscc usco uscs usoc usos usov ussc ussr usss ussu usus uuoc uuuu uv-c uvok uvvu vcrs vkor voks vooc voor vor- voro vors voru voso voss vosu vouk vour vous vovk vroc vruk vssc vuco vuku vvvv