bbbb bbci bbdd bbdo bbrc bcbc bccc bcci bcor bcvo bd-r bdbc bddc bdii bibb bibi bibo bicc bici bick bico bidi bido bidr biko bio- bioc bioi birb bird biri birk biro birr bivi bobb bobi bobo bock boco bodb bodi bodo boi- boid boii boki boko boob booc bood book boor bor- bord bori bork boro borr bovi bovo brcb brdo bric brid brik brio brkb brob broc brod brok broo bror brrr brvi c-bo c-cd cbbc cbcc cbcr cbdb cbdc cbdi cbdo cbid cbir cbko cbkr cbrd cbvb cbvr ccbc cccb cccc ccci cccv ccdc ccdi ccdr ccic ccid ccii ccir cciv ccob ccoc ccod ccrc ccri ccvi ccvo cd-r cddb cddr cdic cdii cdio cdiv cdvd cdvi cibc cibi cibo cicc cici cico cicr cidc cidi cidr ciid ciii ciko cikr ciob cior cirb circ ciri cirk ciro cirr civc civo ckbc ckbi ckck ckco ckcv ckdo ckob ckoc ckoi ckoo ckor ckrc ckrd ckvo cobb cobi cobo cock coco codd codi coir cok- coko coob cood cook cor- corb corc cord cori cork coro corr covo crbc crcc crcr crdc crib cric crik crkc crob croc crod crok croo cror cvcc cvid cvii cvrd cvrr d-bo dbcc dcbc dccb dccc dcci dccv dcdb dcii dcio dciv dcrk dcvd dcvi dddd ddoc ddrc dibb dibo dici dick dico didi dido diii diiv diki diko dioc dior dird dirk dirr divd divi divo dkdc dkid dobb dobi doci dock doco dod- dodd dodi dodo doid doki doko doob dood dook door dorc dord dori dork doro dorr dovi drbc drib dric drob drod dvdr dvi- dvii dvir dvor ibdo ibid ibrc ibrd ibri ibro icbc icbd iccb iccc icci icco iccr icdc icdd icoc icod icor icrc icrr idcr iddo idic idid idio idir idoc idrc idro idvd iicd iiii iiio iioi iioo iirc ikid ikki ikko ikoo ikri iobi ioci iod- iodd iodo ioii ioio ioko iooi iooo iori ircc ircd irdc irdo iri- iric irid irio irki irob iroc irod irov irrc irri ivbv ivdr ivic ivod ivor k-ci k-id kbbb kbbc kbbd kbbi kbbk kbbo kbbr kbcb kbci kbck kbco kbcr kbdb kbdi kbdo kbdr kbdv kbib kbic kbid kbik kbio kbkb kbkk kbko kbkr kbkv kbob kboc kbod kboi kbok kboo kbov kbrb kbrc kbrd kbri kbrk kbro kbrv kbvb kbvc kbvo kbvr kcbc kcbd kcbi kcbk kcbr kccb kccc kccd kcci kcck kccr kccv kcdc kcdd kcdi kcdr kcdv kcic kcid kcii kcir kciv kckc kckk kcko kckr kckv kcob kcor kcrc kcri kcro kcrr kcrv kcvd kcvi kcvk kcvo kcvr kcvv kdbb kdbi kdbr kdbv kdcc kdcd kdco kdcr kddb kddc kddd kddi kddk kddr kdic kdio kdkb kdkd kdkk kdko kdkr kdoc kdok kdov kdrb kdri kdro kdrv kdvb kdvi kdvr kdvv kibb kibc kibi kibo kibr kicb kicc kicd kick kicr kidb kidd kidi kidk kido kidr kiic kiid kiii kiik kikc kikd kiki kikk kiko kikr kioc kiod kioi kiok kioo kirb kirc kiri kirk kiro kirr kirv kivi kkbb kkbd kkbi kkbo kkbr kkcb kkcd kkci kkck kkco kkcr kkdc kkdd kkdo kkdv kkic kkid kkik kkkk kkob kkoo kkor kkov kkrb kkrc kkrk kkro kkrr kkrv kkvr kkvv kobb kobc kobi kobk kobo kobr kocb kocd koci kock kodi kodk kodo kodv koii koir koiv kokb kokc koki kokk koko kokr koob kooc kooi kook kooo koor koov korb korc kord kori kork koro korr korv kovc kovi kovk kovo kovr krbb krbd krbi krbk krbr krcb krcc krcd krci krco krdc krdd krdo krdr krib krid krik krio kriv krkc krkd krki krkk krko krkr krkv krob kroc krod 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 kvod kvoi kvok kvoo kvor kvov kvrc kvri kvro kvrr kvrv kvvr kvvv obbo obid obkb oboi obok obor obri obro obvi ocbc occc occi ocro ocrr odbo odci oddd oddi odic odio odir odoo odor oici oick oido oiii oiko okic okir okko okok okor okro oobi oocr oodi ooid oooo oord orbb orbi orbo orci orco ordo ori- oric orid orio orko oro- orok oror orri orro orvr ovi- ovid ovo- ovod ovoo rbbb rbbr rcbc rcbo rccb rccc rcdc rcic rcid rcrd rcvr rdio rdoc rib- ribo ricc rick rico ridc ridd ridi rido riki rikk riri rivo rob- robb robi robo rocc rock roco rodd rodi rodo roid roik roio roir roki rokk roko rokr roob rood rooi rook roor rorc rori rork roro rovi rovo rrrr rv-c rvik vbcc vcbi vcci vdcc vdio vic- vici vick vico vidi vido viii viik viki viko virb virc viri virk viro virr vivi vivo vkor vodo voic void voio voir vooc voor vor- vord vori voro vovk vrci vrdi vrio vroc vvob vvvv