bbbb bbci bbeb bbrc bcbc bccc bcci bcec bcer bcie bcor bcru bcuc bcvo bebb bebe bebi bebo beci becu beeb beer beic beir beo- beor berc bere beri bero berr beru beur bevo bibb bibe bibi bibo bicc bice bici bico bieb bier bieu bio- bioc bioi biou birb bire biri biro birr biru bive bivi bobb bobe bobi bobo bobu boce boco bocu boec boee boeo boer boi- boie boii boiu boob booc booe boor bor- bore bori boro borr boru boue bour bove bovi bovo brcb brce breb brec bree brei breo brer brev bric brie brio brob broc broe broo bror brou brrr bruc brue bruv brvi bubb bube bubi bubo bubu bucc buce buci buco bucu buer bueu buic buie buir buiu bur- burb bure buri buro burr buru buve c-bo cbbc cbcc cbce cbcr cbcu cbec cbee cber cbir cbre cbvb cbve cbvr ccbc cccb cccc ccci cccu cccv ccee ccic ccii ccir cciv ccob ccoc ccrc ccre ccri ccuc ccvi ccvo cebu cec- cece ceci ceco ceeb ceec ceor ceou cer- cerc cere ceri cero ceui cevo cibc cibe cibi cibo cicc cici cico cicr cicu ciee cier ciii ciob cior cirb circ cire ciri ciro cirr ciuc civc cive civo cobb cobe cobi cobo cobu coce coco cocu coir coob cor- corb corc core cori coro corr coub coue cour cove covo crbc crbu crcc crce crcr cre- creb crec cree crei creo creu crib cric crie criu crob croc croe croo cror crub crue cub- cubb cube cubi cucc cuce cuci cuer cui- cuir curb cure curi curo curr cuve cvcc cver cvii cvrr ebbc ebbo ebbr ebcc eber ebic eboe eboo ebor ebro ebru ebur ecbc ecbe eccb eccc ecce ecci ecco ecib eco- ecou ecrc ecri ecrr ecru ecrv eeee eeoc eerc eero eico eiec eiei eier eiou eire eoir eore eori erbb erbe ercc erce ereb erec erei erer erev eric erie erio eriu erob eroc eroe eroi eroo errc erre erro erub eruc erur eruv erve ervi eubc eubi euer euoi eur- eurc eure euro ever evie evir evoe evoo evre i-be ibec ibie ibrc ibri ibro icbc iccb iccc icci icco iccr iccu icec icee icer icoc icor icrc icre icrr icru icub icue iecc ieie ieio iere ieri iiie iiii iiio iioi iioo iirc iiuc iobi ioci ioee ioii ioio iooi iooo iore iori irbe ircc ircu iree irer iri- iric irie irio irob iroc irov irrc irre irri iucc iuce iucv iuiu ivbv ivec iver ivic ivie ivor ivre ivue o-eo obbo obec ober obie oboe oboi obor obre obri obro obvi ocbc occc occi oce ocee ocre ocro ocrr ocur oec- oecc oeec oere oici oier oiii oire oobe oobi oocr ooer oooo oore orbb orbe orbi orbo orbu orce orci orco ore- oreb orec oreo orer ori- oric orie orio oro- oroe oror orri orro orub orve orvr oucc ouer ouie ouii ouir our- oure ouro ouu- ovee over ovi- ovie ovo- ovoo ovre rbbb rbbr rcbc rcbo rccb rccc rcic rcuv rcvr rebb rebe rebo rebu recc rece reci recr recu reeb reev reii reir reiu reou rere reri rero reru reue reuu reve revi revo rib- ribe ribo ribu ricc rice rico rier rieu riou rire riri riue rive rivo rob- robb robe robi robo robu rocc roce roco roer roev roio roir roiu roob rooi roor rorc rore rori roro roru roub roue rove rovi rovo rrrr rubb rube rubi rubu ruce ruci ruer rurc rure ruri ruro ruru ruve ruvi ruvu rv-c rver u-ie ubbe ubbi ubbo uber ubic ubii ubir uboc ucbc ucci ucio ucrc ueir uirr uocc uor- uore uovo urbe urbi urci ure- urib uric urie uriu uro- uroo urre urri urur urve uuoc uuri uuuu uv-b uv-c uver uvic uvri uvvu vbcc vcbi vcci vecc veci veer veie veii veir veor ver- verb vere veri vero veur veve vevi vevo vibe vic- vice vici vico vier vieu viii virb virc vire viri viro virr viru viue vive vivi vivo voce voei voer voeu voic voie voio voir vooc voor vor- vore vori voro voru voue vour vrci vreo vrio vroc vuco vuir vurb vver vvob vvvv