-ic bbb bbc bbd bbi bbk bbo bbr bcb bcc bcd bci bck bco bcr bdb bdc bdd bdi bdk bdo bdr bi- bib bic bid bii bik bio bir bkb bkc bkk bko bkr bob boc bod boi bok boo bor brb brd bri brk bro brr c-- cbb cbc cbd cbi cbk cbo cbr ccb ccc ccd cci cck cco ccr cdb cdc cdd cdi cdk cdo cdr ci- cib cic cid cii cik cio cir ckb ckc ckd cki cko co- cob coc cod coi cok coo cor crb crc crd cri crk cro crr dbb dbc dbd dbi dbk dbo dbr dcb dcc dcd dci dck dco dcr ddb ddc ddd ddi ddk ddo ddr di- dib dic did dii dik dio dir dkb dkc dki dkk dko dkr dob doc dod doi dok doo dor drb drc drd dri drk dro drr i-d ibb ibc ibd ibi ibk ibo ibr icb icc icd ici ick ico icr idb idc idd idi idk ido idr iib iic iid iii iio iir ikb ikc iki ikk iko ikr io- iob ioc iod ioi ioo ior ir- irb irc ird iri irk iro irr kbb kbc kbd kbi kbk kbo kbr kcb kcc kcd kci kck kcr kdb kdc kdk kdo kdr kib kic kid kii kik kio kir kkb kkc kki kkk kkr kob koc kod koi kok koo kor krc krd kri krk kro krr o-i ob- obb obc obd obi obk obo obr oc- ocb occ ocd oci ock oco ocr odb odc odd odi odo odr oib oic oid oii oik oio oir okb okc okd oki okk oko okr oo- oob ooc ood ooi ook ooo oor or- orb orc ord ori ork oro orr rbb rbc rbd rbi rbk rbo rbr rcb rcc rcd rci rco rcr rdb rdc rdd rdi rdo rdr rib ric rid rii rik rio rir rkb rkc rkk rko rob roc rod roi rok roo ror rrb rrc rrd rri rrk rrr

bbbb bbci bbdd bbdo bbrc bcbc bccc bcci bcor 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 bobb bobi bobo bock boco bodb bodi bodo boi- boid boii boki boko boob booc bood book boor bor- bord bori bork boro borr brcb brdo bric brid brik brio brkb brob broc brod brok broo bror brrr c-bo c-cd cbbc cbcc cbcr cbdb cbdc cbdi cbdo cbid cbir cbko cbkr cbrd ccbc cccb cccc ccci ccdc ccdi ccdr ccic ccid ccii ccir ccob ccoc ccod ccrc ccri cd-r cddb cddr cdic cdii cdio cibc cibi cibo cicc cici cico cicr cidc cidi cidr ciid ciii ciko cikr ciob cior cirb circ ciri cirk ciro cirr ckbc ckbi ckck ckco ckdo ckob ckoc ckoi ckoo ckor ckrc ckrd cobb cobi cobo cock coco codd codi coir cok- coko coob cood cook cor- corb corc cord cori cork coro corr crbc crcc crcr crdc crib cric crik crkc crob croc crod crok croo cror d-bo dbcc dcbc dccb dccc dcci dcdb dcii dcio dcrk dddd ddoc ddrc dibb dibo dici dick dico didi dido diii diki diko dioc dior dird dirk dirr dkdc dkid dobb dobi doci dock doco dod- dodd dodi dodo doid doki doko doob dood dook door dorc dord dori dork doro dorr drbc drib dric drob drod 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 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 irrc irri k-ci k-id kbbb kbbc kbbd kbbi kbbk kbbo kbbr kbcb kbci kbck kbco kbcr kbdb kbdi kbdo kbdr kbib kbic kbid kbik kbio kbkb kbkk kbko kbkr kbob kboc kbod kboi kbok kboo kbrb kbrc kbrd kbri kbrk kbro kcbc kcbd kcbi kcbk kcbr kccb kccc kccd kcci kcck kccr kcdc kcdd kcdi kcdr kcic kcid kcii kcir kckc kckk kcko kckr kcob kcor kcrc kcri kcro kcrr kdbb kdbi kdbr kdcc kdcd kdco kdcr kddb kddc kddd kddi kddk kddr kdic kdio kdkb kdkd kdkk kdko kdkr kdoc kdok kdrb kdri kdro 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 kkbb kkbd kkbi kkbo kkbr kkcb kkcd kkci kkck kkco kkcr kkdc kkdd kkdo kkic kkid kkik kkkk kkob kkoo kkor kkrb kkrc kkrk kkro kkrr kobb kobc kobi kobk kobo kobr kocb kocd koci kock kodi kodk kodo koii koir kokb kokc koki kokk koko kokr koob kooc kooi kook kooo koor korb korc kord kori kork koro korr krbb krbd krbi krbk krbr krcb krcc krcd krci krco krdc krdd krdo krdr krib krid krik krio krkc krkd krki krkk krko krkr krob kroc krod kroi krok kroo kror krrb krrc krri krrk krro krrr obbo obid obkb oboi obok obor obri obro 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 rbbb rbbr rcbc rcbo rccb rccc rcdc rcic rcid rcrd rdio rdoc rib- ribo ricc rick rico ridc ridd ridi rido riki rikk riri 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 rrrr

b-r-k bbook bckdk bcock bdoor bibbo bibic bibio bibod bibri bidor bidri bikok bioci bioco bioko birck birdo biroc bo-bo bobbi bobik bobko boboc bobok bobr bobri bocci bocki bocor bodd- bodio bodir