bbbb bbdd bbdo bblb bd-r bdii bibb bibi bibl bibo bidi bido bidr bidu bild bili bill bilo bilt bilu bio- bioi biol biot biou birb bird biri birl biro birr birt biru bitd bito bitt bitu blbt bldr blio blir blit blob blod bloo blot blou blub blud blur blut bobb bobi bobo bobu bodb bodi bodo bodu boi- boid boii boil boit boiu bold boli boll bolo bolt bolu boob bood bool boor boot bor- bord bori boro borr bort boru botb botd boti boto bott boud boul bour bout brdo brdt brid bril brio brit brob brod brol broo bror brot brou brrr brud brut btdt btob btor btrt bttb bubb bubi bubo bubu budb budd budi budl budo budu buid buir buit buiu bulb buld buli bull bult bulu buol bur- burb burd buri burl buro burr burt buru but- buti buto butt d-bo dbit dbtt dddd ddot ddub dibb dibo didi dido didu diii dili dill dilo diol dior diot diou dird dirl dirr dirt diti dito ditt dlbd dlib dlii dlil dlit dobb dobi dobl dobu dod- dodd dodi dodo doid doil doit dold doli doll dolo dolt dolu doob dood dool door doot dord dori doro dorr dort doru dotd doti doto dott doub doud doul dour dout drib dril drit drob drod drol drot drou drub drui drut druu dtor dtot dtrl dub- dubb dubu dudd dudo dudu duid duil duir duit duli dull dulo dult dulu duo- duri duro durt duru duul duur duut ibdo ibid ibot ibrd ibri ibro ibtb ibtl iddo idid idil idio idir idli idol idro idub iduo iiii iiio iiit iioi iioo iitr iitt ilio ilir ilit ill- illd illi illo illt iloo ilot ilud ilut iobi iod- iodd iodo ioii ioio ioit iolo iooi iooo iori ioto irdo iri- irid iril irio irlb irob irod irri irti irul itdo itil itll itoi itol itoo itor itou itri itto itur iuiu lblr lbrt libo libr libu lidb lidl lido liii liir lilb lili lill lilo lilt lilu lio- liod lior lird liri lirl liro lirr lirt liru litb litd liti litl lito litr litt litu liut lldb llll llod lloo llud lob- lobb lobi lobo lodi loid loir loit loiu lold loli loll lolo loob lood lool loor loot lord lori loro lotd loti lotl loto lotr lott loud loui loul lour lout louu lrdd lroi lrrr ltbl ltib lttr ludd ludi ludo luit luli lull lulu lurd luri lurt luti obbo obdt obid obit oblu oboi obol obor obot obri obro obtd odbo oddd oddi odio odir odiu odoo odor odot odou odrl odtu odur oido oiii oirt oiti olbo oldb olib olid olio olit olli ollo olor olot oltu olur oobi oodi ooid oold oolo oooo oord oort ootb orbb orbi orbo orbu ordo ordu ori- orid oril orio orit orlo orlu oro- oror orot orri orro orto orub otbd otit oto- otoo otor otro otti otto ottu otur ouii ouir ouit ould oulu our- ouro ourt out- outb outi outo ouu- rbbb rbbr rdio rib- ribo ribu ridd ridi rido rill rilo rilu riol riot riou riri riti ritl rito ritt ritu rldt rob- robb robi robo robt robu rodd rodi rodo roid roil roio roir roit roiu rold roll rolo rolt roob rood rooi rool roor root rori roro rort roru roti rotl roto rotr rott roub roud roul rout rrrr rtdt rtlt rubb rubi rubu rudd rudi rudl rudo ruid ruit rull rulo rurd ruri ruro ruru ruti rutl ruto rutt rutu ruud tbil tbit tbrb tddb tdil tdor tdri tibi tibu tidd tiit tiiu tild till tilo tilr tilt tiou tirb tird tiri tirl tiro tirr tiru titi tito titt titu tldr tlli tobi tobo tobt tobu todd todi todo todt todu toid toil toit tol- told toli toll tolo tolt tolu tood tool toor toot tord tori toro torr tort toru totd toti toto totr tott toui toul tour tout tri- trib tril trio trit trod troi troo trot trou trtr trub trud trut truu ttbb tttt ttul tubb tubo tubr tubu tudi tudu tuil tuit tuiu tuli tull tulo tulu tuor turb turd turi turo turr turt turu tuti tutl tuto tutt tutu tuuo ubbi ubbo ubid ubii ubir ubit ubli ublo ubod ubud uddi udid udir udoo udot uirr ulli ullo ullr ulo- ulti ulto ultt ulul uor- urbi urdu urib uriu uro- urol uroo urri urur urut utid util utor utri utti utto uttu uulu uuri uuuu