bbbb bbci bbeb bbox bbrc bcbc bccc bcci bcec bcer bcie bcor bcru bcuc bebb bebe bebi bebo beci becu beeb beer beic beir beo- beor berc bere beri bero berr beru beur beux bibb bibe bibi bibo bicc bice bici bico bieb bier bieu bio- bioc bioi biou biox birb bire biri biro birr biru birx bixi bobb bobe bobi bobo bobu boce boco bocu boec boee boeo boer boi- boie boii boiu boob booc booe boor boox bor- bore bori boro borr boru boue bour brcb brce breb brec bree brei breo brer brex bric brie brio brix brob broc broe broo bror brou brox brrr bruc brue brux bubb bube bubi bubo bubu bucc buce buci buco bucu buer bueu buic buie buir buiu buix bur- burb bure buri buro burr buru c-bo cbbc cbcc cbce cbcr cbcu cbec cbee cber cbir cbox cbre cbux ccbc cccb cccc ccci cccu ccee ccic ccii ccir ccix ccob ccoc ccrc ccre ccri ccuc ccxi cebu cec- cece ceci ceco ceeb ceec ceor ceou cer- cerc cere ceri cero ceui ceux cexe cibc cibe cibi cibo cicc cici cico cicr cicu ciee cier ciii ciob cior cirb circ cire ciri ciro cirr ciuc cixi cobb cobe cobi cobo cobu coce coco cocu coex coir coix coob cor- corb corc core cori coro corr coub coue cour coux coxe crbc crbu crcc crce crcr cre- creb crec cree crei creo creu crex crib cric crie criu crob croc croe croo cror crub crue crux cub- cubb cube cubi cucc cuce cuci cuer cui- cuir curb cure curi curo curr cxii cxix cxro cxxi cxxx ebbc ebbo ebbr ebcc eber ebic ebix eboe eboo ebor ebox ebro ebru ebur ecbc ecbe eccb eccc ecce ecci ecco ecib eco- ecou ecrc ecri ecrr ecru eeee eeoc eerc eero eico eiec eiei eier eiou eire eoir eore eori eoux er-x erbb erbe ercc erce ereb erec erei erer eric erie erio eriu erob eroc eroe eroi eroo errc erre erro erub eruc erur eubc eubi euer euoi eur- eurc eure euro exco exec exer exo- exor exrx i-be ibec ibex ibie ibox ibrc ibri ibro icbc iccb iccc icci icco iccr iccu icec icee icer icex 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 ircx iree irer irex iri- iric irie irio irix irob iroc irrc irre irri iucc iuce iuiu ixxi o-eo obbo obec ober obex obie obix oboe oboi obor obox obre obri obro 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 orex ori- oric orie orio orix oro- oroe oror orri orro orub oucc ouer ouie ouii ouir our- oure ouro ouu- oxer oxi- oxic oxie oxo- oxox oxxo rbbb rbbr rcbc rcbo rccb rccc rcic rebb rebe rebo rebu recc rece reci recr recu reeb reii reir reiu reou rere reri rero reru reue reuu reux rexx rib- ribe ribo ribu ricc rice rico rier rieu riex riou rire riri riue rixc rixe rixo rob- robb robe robi robo robu rocc roce roco roer roio roir roiu roob rooi roor roox rorc rore rori roro roru roub roue roux roxo rrrr rubb rube rubi rubu ruce ruci ruer rurc rure ruri ruro ruru u-ie ubbe ubbi ubbo uber ubic ubii ubir uboc ucbc ucci ucio ucrc ueir uirr uocc uor- uore urbe urbi urci ure- urex urib uric urie uriu urix uro- uroo urox urre urri urur uuoc uuri uuuu uxor uxue xbee xbox xcii xcri xeer xer- xero xexe xibe xibo xibu xico xiii xixi xobc xoco xoro xoxo xuri xuxu xxii xxix xxxi xxxo xxxx