bbbb bbdd bbdo bblb bd-r bdii bibb bibi bibl bibo bidi bido bidr bild bili bill bilo bilt bio- bioi biol biot birb bird biri birl biro birr birt bitd bito bitt blbt bldr blio blir blit blob blod bloo blot bobb bobi bobo bodb bodi bodo boi- boid boii boil boit bold boli boll bolo bolt boob bood bool boor boot bor- bord bori boro borr bort botb botd boti boto bott brdo brdt brid bril brio brit brob brod brol broo bror brot brrr btdt btob btor btrt bttb d-bo dbit dbtt dddd ddot dibb dibo didi dido diii dili dill dilo diol dior diot dird dirl dirr dirt diti dito ditt dlbd dlib dlii dlil dlit dobb dobi dobl dod- dodd dodi dodo doid doil doit dold doli doll dolo dolt doob dood dool door doot dord dori doro dorr dort dotd doti doto dott drib dril drit drob drod drol drot dtor dtot dtrl ibdo ibid ibot ibrd ibri ibro ibtb ibtl iddo idid idil idio idir idli idol idro iiii iiio iiit iioi iioo iitr iitt ilio ilir ilit ill- illd illi illo illt iloo ilot iobi iod- iodd iodo ioii ioio ioit iolo iooi iooo iori ioto irdo iri- irid iril irio irlb irob irod irri irti itdo itil itll itoi itol itoo itor itri itto lblr lbrt libo libr lidb lidl lido liii liir lilb lili lill lilo lilt lio- liod lior lird liri lirl liro lirr lirt litb litd liti litl lito litr litt lldb llll llod lloo lob- lobb lobi lobo lodi loid loir loit lold loli loll lolo loob lood lool loor loot lord lori loro lotd loti lotl loto lotr lott lrdd lroi lrrr ltbl ltib lttr obbo obdt obid obit oboi obol obor obot obri obro obtd odbo oddd oddi odio odir odoo odor odot odrl oido oiii oirt oiti olbo oldb olib olid olio olit olli ollo olor olot oobi oodi ooid oold oolo oooo oord oort ootb orbb orbi orbo ordo ori- orid oril orio orit orlo oro- oror orot orri orro orto otbd otit oto- otoo otor otro otti otto rbbb rbbr rdio rib- ribo ridd ridi rido rill rilo riol riot riri riti ritl rito ritt rldt rob- robb robi robo robt rodd rodi rodo roid roil roio roir roit rold roll rolo rolt roob rood rooi rool roor root rori roro rort roti rotl roto rotr rott rrrr rtdt rtlt tbil tbit tbrb tddb tdil tdor tdri tibi tidd tiit tild till tilo tilr tilt tirb tird tiri tirl tiro tirr titi tito titt tldr tlli tobi tobo tobt todd todi todo todt toid toil toit tol- told toli toll tolo tolt tood tool toor toot tord tori toro torr tort totd toti toto totr tott tri- trib tril trio trit trod troi troo trot trtr ttbb tttt