bbbb bbci bbdd bbdo bbrc bcbc bccc bcci bcit bcor bctc bd-j bd-r bdbc bddc bdii bibb bibi bibo bicc bici bico bidi bido bidr biji bio- bioc bioi biot birb bird biri biro birr birt bitc bitd bito bitt bjcc bobb bobi bobo boco bodb bodi bodo boi- boid boii boit bojd boji bojo bojt boob booc bood boor boot bor- bord bori borj boro borr bort botb botd boti boto bott brcb brdo brdt bric brid brio brit brob broc brod broo bror brot brrr brtc btcc btdt btob btor btrc btrt bttb c-bo c-cd cbbc cbcc cbcr cbct cbdb cbdc cbdi cbdo cbid cbir cbit cbot cbrd cbrj cbrt cbtc ccbc cccb cccc ccci ccdc ccdi ccdr ccic ccid ccii ccir ccjo ccob ccoc ccod ccrc ccri ccrt cctb cctc cctt cd-r cddb cddr cdic cdii cdio cdot cibc cibi cibo cicc cici cico cicr cict cidc cidi cidr cidt ciid ciii ciit ciob cior cirb circ ciri ciro cirr cirt citb citi cito citt cjbc cjcb cjcj cjdc cjic cjob cjoi cjor cjrb cjrc cjrj cjtr cobb cobi cobo coco coct codd codi coir coit cojo coob cood coot cor- corb corc cord cori coro corr cort cotb cotc coti coto cott crbc crcc crcr crdc crib cric crit crob croc crod croo cror crot crrt crtc ctbi ctic ctor ctot ctrc d-bo dbcc dbit dbtt dcbc dccb dccc dcci dcct dcdb dcii dcio dctc dddd ddoc ddot ddrc dibb dibo dici dico dict didi didj dido diii dijo dioc dior diot dird dirr dirt diti dito ditt dobb dobi doci doco doct dod- dodd dodi dodo doid doit doji dojo doob dood door doot dorc dord dori doro dorr dort dotd doti doto dott drbc drib dric drit drob drod drot dtcc dtor dtot ibdo ibid ibot ibrc ibrd ibri ibro ibtb ibtc icbc icbd iccb iccc icci icco iccr icct icdc icdd icoc icod icor icrc icrr icrt idcr iddo idic idid idio idir idjc idoc idrc idro iicd iiii iiio iiit iioi iioo iirc iitr iitt ijdb ijji iobi ioci iod- iodd iodo ioii ioio ioit iooi iooo iori ioto ircc ircd irdc irdo iri- iric irid irio irob iroc irod irrc irri irti itdo itic itoi itoo itor itri itto j-ro jbob jcbc jccc jcci jcrc jibb jibi jidi jido jiji jird jiri jiro jirt jiti jito jjcc jobo joco jodi jodo joio joit joji jojo joor joot joro jort joto jott jrbr jrtc jtbc jtcc jtdc obbo obdt obid obit oboi obor obot obri obro obtd ocbc occc occi occt ocro ocrr oct- octi octo odbo odci oddd oddi odic odio odir odoo odor odot oici oido oiii oirt oitc oiti oobi oocr oodi ooid ooij ooji oooo oord oort ootb orbb orbi orbo orci orco ordo ori- oric orid orio orit orji oro- oror orot orri orro ortc orto otbd otcd otic otit oto- otoo otor otro otti otto rbbb rbbr rcbc rcbo rccb rccc rcdc rcic rcid rcrd rctc rcti rdio rdoc rib- ribo ricc rico rict ridc ridd ridi rido riji rijo riot riri riti rito ritt rjdj rob- robb robi robo robt rocc roco rodd rodi rodo roid roio roir roit roji rojo roob rood rooi roor root rorc rori roro rort rotc roti rotj roto rotr rott rrrr rtcc rtdt tbcb tbcc tbcd tbit tbrb tccc tcdd tctc tddb tdor tdri tibi ticc tico tidc tidd tiit tijd tiji tijo tirb tird tiri tiro tirr titc titi tito titt tobi tobo tobt toci toco todd todi todo todt toid toit toji tojo tood toor toot torc tord tori toro torr tort totc totd toti toto totr tott trcc tri- trib tric trio trit troc trod troi troo trot trtc trtr ttbb tttt