duct duda dudd dudo dudu duid duir duit duo- dura duri duro durt duru duta duur duut iaaa iaac iaai iaat iaba iaca iacc iacr iact iacu iadb iadc iadt iaia iara iarc iart iaru iata iatc iati ibac ibad ibar ibat ibca ibdo ibia ibid ibot ibra ibrc ibrd ibri ibro ibtb ibtc icaa icab icac icad icai icao icar icat icbc icbd icca iccb iccc icci icco iccr icct iccu icdc icdd icoc icod icor icra icrc icrr icrt icru icta icub idad idar idat idca idcr idda iddo idia idic idid idio idir idoc idra idrc idro idta idub iduo iiac iica iicd iida iiii iiio iiit iioi iioo iira iirc iita iitr iitt iiuc ioba iobi ioci iod- ioda iodd iodo ioii ioio ioit iooi iooo iora iori iota ioto irac irad irai irao irar irca ircc ircd ircu irda irdc irdo iri- iria iric irid irio irob iroc irod irra irrc irri irta irti itaa itac itai itar itat itdo itia itic itoi itoo itor itou itra itri itta itto itur iucc iuiu iura oaau oaic oara obad obai obba obbo obdt obia obid obit oboi obor obot obra obri obro obtd ocab ocac ocad ocat ocbc occa occc occi occt ocra ocro ocrr oct- octa octi octo ocur odac odai odbo odci odda oddd oddi odia odic odio odir odiu odoo odor odot odou odra odtu odur oiba oici oido oiii oira oirt oita oitc oiti ooaa ooba oobi oocr ooda oodi ooia ooid oooo oora oord oort ootb orab orac orad orai orao orar orat orba orbb orbi orbo orbu orca orci orco orda ordo ordu ori- oria oric orid orio orit oro- oror orot orra orri orro orta ortc orto orub otac otar otbd otcd otic otit oto- otoo otor otra otro otta otti otto ottu otur ouac ouad ouat oucc oudc ouii ouir ouit our- oura ouro ourt out- outa outb outi outo ouu- raab raad raat raba rabb rabi rabo rabu rac- raca racc raci raco ract racu rada radc radd rado radr radt radu raia raic raid raii rair rait raiu raob raoc rara rarb rari raro rata rati rato ratt ratu raua raub rauc raud raut rbbb rbbr rcac rcbc rcbo rccb rccc rcdc rcic rcid rcrd rctc rcti rdac rdio rdoc riaa riab riad riai riat riau rib- riba ribo ribu rica ricc rico rict rida ridc ridd ridi rido riia riot riou riri rita riti rito ritt ritu roab road roar roat rob- roba robb robi robo robt robu roca rocc roco roda rodd rodi rodo roia roid roio roir roit roiu roob rood rooi roor root rora rorc rori roro rort roru rota rotc roti roto rotr rott roua roub roud rout rrad rrat rrrr rtai rtca rtcc rtdt ruad ruba rubb rubi rubu ruca ruci ruct ruda rudd rudi rudo ruid ruit rura rurc rurd ruri ruro ruru ruta ruti ruto rutt rutu ruud taa- taar taat taba tabb tabc tabi tabo tabu taca tacc taci taco tact tada tado taia taio tair tait taoa taor taou tara tarb tarc tard tari taro tarr tart taru tata tatb tati tato tatr tatt tatu taua taub tauc taur taut tbar tbca tbcb tbcc tbcd tbit tbrb tbta tcad tcca tccc tccu tcdd tctc tdac tddb tdor tdra tdri tiaa tiab tiao tiar tiba tibi tibu tica ticc tico tidc tidd tiit tiiu tiou tira tirb tird tiri tiro tirr tiru tita titc titi tito titt titu toab toad toat toau toba tobi tobo tobt tobu toca toci toco toda todd todi todo todt todu toid toit tooa tood toor toot tora torc tord tori toro torr tort toru tota totc totd toti toto totr tott toui tour tout traa trab trac trad trai trao trat trau trca trcc tri- tria trib tric trio trit troa troc trod troi troo trot trou trra trtc trtr trub truc trud trut truu ttab ttbb tttt tuao tuar tuat tuba tubb tubo tubr tubu tuca tucc tuco tudi tudu tuit tuiu tuor tura turb turc turd turi turo turr turt turu tuta tuti tuto tutt tutu tuuo uabc uaca uair uaoc uarc uart uaru uata uatu uaua ubac ubar ubba ubbi ubbo ubic ubid ubii ubir ubit uboc ubod ubra ubud ucad ucai ucar ucat ucbc ucca ucci ucdc ucdd ucio ucrc ucua ucut udaa udad udar udau udbc udca uddi udic udid udir udoo udot udra uica uira uirr uocc uor- urac urad urai urao urat urau urba urbi urca urci urda urdu uria urib uric uriu uro- uroa uroo urra urri urur urut utac utai utau utia utid utor utri utti utto uttu uuoc uuri uuta uuuu