cccc ccci cccv ccic ccii ccir cciv ccoc ccrc ccri ccvi ccvo cicc cici cico cicr ciii ciko cikr cior circ ciri cirk ciro cirr civc civo ckck ckco ckcv ckoc ckoi ckoo ckor ckrc ckvo cock coco coir cok- coko cook cor- corc cori cork coro corr covo crcc crcr cric crik crkc croc crok croo cror cvcc cvii cvrr iccc icci icco iccr icoc icor icrc icrr iiii iiio iioi iioo iirc ikki ikko ikoo ikri ioci ioii ioio ioko iooi iooo iori ircc iri- iric irio irki iroc irov irrc irri ivic ivor k-ci kccc kcci kcck kccr kccv kcic kcii kcir kciv kckc kckk kcko kckr kckv kcor kcrc kcri kcro kcrr kcrv kcvi kcvk kcvo kcvr kcvv kicc kick kicr kiic kiii kiik kikc kiki kikk kiko kikr kioc kioi kiok kioo kirc kiri kirk kiro kirr kirv kivi kkci kkck kkco kkcr kkic kkik kkkk kkoo kkor kkov kkrc kkrk kkro kkrr kkrv kkvr kkvv koci kock koii koir koiv kokc koki kokk koko kokr kooc kooi kook kooo koor koov korc kori kork koro korr korv kovc kovi kovk kovo kovr krcc krci krco krik krio kriv krkc krki krkk krko krkr krkv kroc kroi krok kroo kror krov krrc krri krrk krro krrr krvc krvi krvk krvo krvr krvv kvcc kvci kvck kvco kvcr kvcv kvic kvik kvir kviv kvoc kvoi kvok kvoo kvor kvov kvrc kvri kvro kvrr kvrv kvvr kvvv occc occi ocro ocrr oici oick oiii oiko okic okir okko okok okor okro oocr oooo orci orco ori- oric orio orko oro- orok oror orri orro orvr ovi- ovo- ovoo rccc rcic rcvr ricc rick rico riki rikk riri rivo rocc rock roco roik roio roir roki rokk roko rokr rooi rook roor rorc rori rork roro rovi rovo rrrr rv-c rvik vcci vic- vici vick vico viii viik viki viko virc viri virk viro virr vivi vivo vkor voic voio voir vooc voor vor- vori voro vovk vrci vrio vroc vvvv