bbbb bbbs bbdd bbdo bd-r bdos bdsd bffs bfsr bfts bftt bobb bobo bobs bodb bodo bods bofd boff bofs boob bood boof boor boos boot bor- bord borf boro borr bors bort boso boss bost botb botd boto bots bott brdo brds brdt brob brod broo bror bros brot brrr brrs brsb brsr brst bsbd bsff bsfs bsod bsos bsrd bssd bsts btdt btob btor btrt btss bttb d-bo dbfo dbfs dbos dbrs dbss dbtt dddd ddot ddss ddts dfds dfdt dfrf dftr dfts dobb dobs dod- dodd dodo dods doff doob dood doof door doos doot dord dorf doro dorr dors dort doso doss dost dotd doto dots dott drob drod drof drot drrs dsdr dsos dsrr dsst dsto dsts dtor dtot dtss fbrs fbsd fdos fdot fdst ffff ffrr ffss fftf fobs fobt fofo food foof foos foot for- forb ford foro forr fors fort fosb foso foss fost foto fots fott frob fros frot frsb frso frst fsfo fssf ftos ftrs ftsr obbo obdt obor obos obot obro obsd obsr obss obst obtd obts odbo oddd odds odoo odor odos odot odso odts ofdr off- offo offr offs ofor ofst ooff oofs oooo ooos oord oort oost ootb oots orbb orbo orbs ordo ords orff orfs oro- orof oror oros orot orro orrs orso orto orts osoo osor osos osrd osro ossb ossd osso ostr osts otbd otbs oto- otof otoo otor otos otro otrs otso otto otts rbbb rbbr rbbs rbds rbsd rbss rbst rdos rdso rfds rob- robb robo robs robt rodd rodo rods roff rofo roob rood roof roor roos root roro rort roso ross rost roto rotr rots rott rrrr rsdd rsds rsos rsts rtbf rtdt rtfb rtss rtts s-os sbbs sbds sbor sbot sbsd sbst sdds sdot sdrs sdsf sdss sfor sfos sfro sfss sfts sobo sobr sobs sobt sodd sodo sods sofo soft sood soof soor soos soot sorb sord soro sorr sors sort soso soss sost soto sots sros srsd srtr ssbr ssdd ssdf ssot ssrs sssb sssf ssss sstb sstd ssts stbd stbs stds stob stod stof stoo stor stos stot strd stro strs stsf stss sttd sttr tbbs tbrb tbst tddb tdff tdor tdss tfot tfrs tfsd tfss tobo tobs tobt todd todo tods todt toff tofo toft tood toof toor toos toot tord torf toro torr tors tort tosb toso toss tost totd toto totr tots tott trfd trfr trod troo tros trot trsd trst trtr tsbd tsdb tsob tsos tssf tssr tsst tsts ttbb ttff ttss tttt