bbbb bbci bbdd bbdo bbrc bcbc bccc bcci bcor bcoz bd-r bdbc bddc bdii bibb bibi bibo bicc bici bico bidi bido bidr bio- bioc bioi birb bird biri biro birr bizz bobb bobi bobo boco bodb bodi bodo boi- boid boii boob booc bood boor booz bor- bord bori boro borr borz bozi bozo brcb brdo bric brid brio briz brob broc brod broo bror broz brrr bzzz c-bo c-cd cbbc cbcc cbcr cbdb cbdc cbdi cbdo cbid cbir 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 ciob cior cirb circ ciri ciro cirr cobb cobi cobo coco codd codi coir coob cood cor- corb corc cord cori coro corr cozd cozi cozz crbc crcc crcr crcz crdc crib cric crob croc crod croo cror croz d-bo dbcc dcbc dccb dccc dcci dcdb dcii dcio dddd ddoc ddrc dibb dibo dici dico didi dido diii dioc dior dird dirr dizi dizz dobb dobi doci doco dod- dodd dodi dodo doid doob dood door dorc dord dori doro dorr dozi dozo drbc drib dric drob drod droz dzbb dzor dzrr 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 iobi ioci iod- iodd iodo ioii ioio iooi iooo iori ircc ircd irdc irdo iri- iric irid irio irob iroc irod irrc irri izod izzo obbo obid oboi obor obri obro ocbc occc occi ocro ocrr odbo odci oddd oddi odic odio odir odoo odor odzi oici oido oiii oobi oocr oodi ooid oooo oord oozi orbb orbi orbo orci orco ordo ori- oric orid orio oro- oror oroz orri orro orzo ozd rbbb rbbr rcbc rcbo rccb rccc rcdc rcic rcid rcrd rdio rdoc rib- ribo ricc rico ridc ridd ridi rido rioz riri rizi rizz rob- robb robi robo rocc roco rodd rodi rodo roid roio roir roiz roob rood rooi roor rooz rorc rori roro rozi rozz rrrr z-ro zibo zico zidi zirc ziri ziro zizi zizz zobo zoco zodd zodi zoic zoid zoio zoo- zorb zorc zord zori zoro zozo zzzz