bbbb bbci bbrc bcbc bccc bcci bcor bcvo bibb bibi bibo bicc bici bick bico biko bio- bioc bioi birb biri birk biro birr bivi bobb bobi bobo bock boco boi- boii boki boko boob booc book boor bor- bori bork boro borr bovi bovo brcb bric brik brio brkb brob broc brok broo bror brrr brvi c-bo cbbc cbcc cbcr cbir cbko cbkr cbvb cbvr ccbc cccb cccc ccci cccv ccic ccii ccir cciv ccob ccoc ccrc ccri ccvi ccvo cibc cibi cibo cicc cici cico cicr ciii ciko cikr ciob cior cirb circ ciri cirk ciro cirr civc civo ckbc ckbi ckck ckco ckcv ckob ckoc ckoi ckoo ckor ckrc ckvo cobb cobi cobo cock coco coir cok- coko coob cook cor- corb corc cori cork coro corr covo crbc crcc crcr crib cric crik crkc crob croc crok croo cror cvcc cvii cvrr ibrc ibri ibro icbc iccb iccc icci icco iccr icoc icor icrc icrr iiii iiio iioi iioo iirc ikki ikko ikoo ikri iobi ioci ioii ioio ioko iooi iooo iori ircc iri- iric irio irki irob iroc irov irrc irri ivbv ivic ivor k-ci kbbb kbbc kbbi kbbk kbbo kbbr kbcb kbci kbck kbco kbcr kbib kbic kbik kbio kbkb kbkk kbko kbkr kbkv kbob kboc kboi kbok kboo kbov kbrb kbrc kbri kbrk kbro kbrv kbvb kbvc kbvo kbvr kcbc kcbi kcbk kcbr kccb kccc kcci kcck kccr kccv kcic kcii kcir kciv kckc kckk kcko kckr kckv kcob kcor kcrc kcri kcro kcrr kcrv kcvi kcvk kcvo kcvr kcvv kibb kibc kibi kibo kibr kicb kicc kick kicr kiic kiii kiik kikc kiki kikk kiko kikr kioc kioi kiok kioo kirb kirc kiri kirk kiro kirr kirv kivi kkbb kkbi kkbo kkbr kkcb kkci kkck kkco kkcr kkic kkik kkkk kkob kkoo kkor kkov kkrb kkrc kkrk kkro kkrr kkrv kkvr kkvv kobb kobc kobi kobk kobo kobr kocb koci kock koii koir koiv kokb kokc koki kokk koko kokr koob kooc kooi kook kooo koor koov korb korc kori kork koro korr korv kovc kovi kovk kovo kovr krbb krbi krbk krbr krcb krcc krci krco krib krik krio kriv krkc krki krkk krko krkr krkv krob kroc kroi krok kroo kror krov krrb krrc krri krrk krro krrr krvb krvc krvi krvk krvo krvr krvv kvbc kvbr kvcb kvcc kvci kvck kvco kvcr kvcv kvic kvik kvir kviv kvob kvoc kvoi kvok kvoo kvor kvov kvrc kvri kvro kvrr kvrv kvvr kvvv obbo obkb oboi obok obor obri obro obvi ocbc occc occi ocro ocrr oici oick oiii oiko okic okir okko okok okor okro oobi oocr oooo orbb orbi orbo orci orco ori- oric orio orko oro- orok oror orri orro orvr ovi- ovo- ovoo rbbb rbbr rcbc rcbo rccb rccc rcic rcvr rib- ribo ricc rick rico riki rikk riri rivo rob- robb robi robo rocc rock roco roik roio roir roki rokk roko rokr roob rooi rook roor rorc rori rork roro rovi rovo rrrr rv-c rvik vbcc vcbi vcci vic- vici vick vico viii viik viki viko virb virc viri virk viro virr vivi vivo vkor voic voio voir vooc voor vor- vori voro vovk vrci vrio vroc vvob vvvv