bbbb bbbs bbdd bbdo bd-r bdos bdsd bobb bobo bobs bodb bodo bods boob bood boor boos boot bor- bord 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 bsod bsos bsrd bssd bsts btdt btob btor btrt btss bttb d-bo dbos dbrs dbss dbtt dddd ddot ddss ddts dobb dobs dod- dodd dodo dods doob dood door doos doot dord doro dorr dors dort doso doss dost dotd doto dots dott drob drod drot drrs dsdr dsos dsrr dsst dsto dsts dtor dtot dtss obbo obdt obor obos obot obro obsd obsr obss obst obtd obts odbo oddd odds odoo odor odos odot odso odts oooo ooos oord oort oost ootb oots orbb orbo orbs ordo ords oro- oror oros orot orro orrs orso orto orts osoo osor osos osrd osro ossb ossd osso ostr osts otbd otbs oto- otoo otor otos otro otrs otso otto otts rbbb rbbr rbbs rbds rbsd rbss rbst rdos rdso rob- robb robo robs robt rodd rodo rods roob rood roor roos root roro rort roso ross rost roto rotr rots rott rrrr rsdd rsds rsos rsts rtdt rtss rtts s-os sbbs sbds sbor sbot sbsd sbst sdds sdot sdrs sdss sobo sobr sobs sobt sodd sodo sods sood soor soos soot sorb sord soro sorr sors sort soso soss sost soto sots sros srsd srtr ssbr ssdd ssot ssrs sssb ssss sstb sstd ssts stbd stbs stds stob stod stoo stor stos stot strd stro strs stss sttd sttr tbbs tbrb tbst tddb tdor tdss tobo tobs tobt todd todo tods todt tood toor toos toot tord toro torr tors tort tosb toso toss tost totd toto totr tots tott trod troo tros trot trsd trst trtr tsbd tsdb tsob tsos tssr tsst tsts ttbb ttss tttt