cccc ccci ccic ccii ccir ccoc ccrc ccri cicc cici cico cicr ciii ciko cikr cior circ ciri cirk ciro cirr ckck ckco ckoc ckoi ckoo ckor ckrc cock coco coir cok- coko cook cor- corc cori cork coro corr crcc crcr cric crik crkc croc crok croo cror 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 irrc irri k-ci kccc kcci kcck kccr kcic kcii kcir kckc kckk kcko kckr kcor kcrc kcri kcro kcrr kicc kick kicr kiic kiii kiik kikc kiki kikk kiko kikr kioc kioi kiok kioo kirc kiri kirk kiro kirr kkci kkck kkco kkcr kkic kkik kkkk kkoo kkor kkrc kkrk kkro kkrr koci kock koii koir kokc koki kokk koko kokr kooc kooi kook kooo koor korc kori kork koro korr krcc krci krco krik krio krkc krki krkk krko krkr kroc kroi krok kroo kror krrc krri krrk krro krrr 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 rccc rcic ricc rick rico riki rikk riri rocc rock roco roik roio roir roki rokk roko rokr rooi rook roor rorc rori rork roro rrrr