bbbb bbeb bbrc bbrg bcbc bcbg bccc bcec bcer bcor bcru bcuc bebb bebe bebo beck becu beeb beeg beek beer begg bego begu beke beko beo- beok beor berc bere berg berk bero berr beru beuk beur bobb bobe bobo bobu boce bock boco bocu boec boee boeo boer boge bogg bogo boke boko boku boob booc booe boog book boor bor- bore borg bork boro borr boru boue bouk bour brcb brce breb brec bree breg brek breo brer brkb brob broc broe brog brok broo bror brou brrr bruc brue brug bubb bube bubo bubu bucc buce buck buco bucu buer bueu buge bugg bugo buke bukk buko buku bur- burb bure burg burk buro burr buru c-bo cbbc cbcc cbce cbcr cbcu cbec cbee cber cbgb cbkg cbko cbkr cbre ccbc cccb cccc cccu ccee ccgc ccob ccoc ccrc ccre ccrg ccuc cebu cec- cece ceco ceeb ceec cege cego ceke ceor ceou cer- cerc cere cero cgcc cgcg cger cgro ckbc ckbe ckck ckco cker ckgo ckob ckoc ckoo ckor ckrc cobb cobe cobo cobu coce cock coco cocu cogo cok- coke coko coob cook cor- corb corc core corg cork coro corr coub coue couk cour crbc crbu crcc crce crcr cre- creb crec cree creg creo creu crkc crob croc croe crok croo cror crub crue crug cruk cub- cubb cube cucc cuce cuck cuek cuer cuk- cuke curb cure curo curr ebbc ebbo ebbr ebcc eber eboe eboo ebor ebro ebru ebur ecbc ecbe eccb eccc ecce ecco ecko eco- ecog ecou ecrc ecrr ecru eeee eeke eeoc eerc eerg eero egbe egbu egcc egcg egcr egec egee eger eggb egge eggo ego- egor egre ekco ekeb ekek eker ekur eore erbb erbe ercc erce ereb erec erer erg- ergg ergo erke erob eroc eroe eroo errc erre erro erub eruc erur eubc euer euge eur- eurc eure euro gbbo gc-c gcbc gccc gcrg gebe gece geck geek geer gege gegg gego geko geo- geog gerb gere gero geru geue gggg gobe gobo goce gocr goer gogo goke goku goog gook goor gorb gore gorg goro gorr gou- goug gouk gour grbr grcc grce greb grec gree greg greu grob groc grog grok groo gror grou grrr grub grue grug grur gubb gubu guck guer gugb guge gugg gugu gurb gure gurg gurk guro gurr guru kbbb kbbc kbbe kbbg kbbk kbbo kbbr kbbu kbcb kbce kbck kbco kbcr kbcu kbeb kbec kbee kbek kbeo kber kbgb kbge kbgg kbgo kbgr kbkb kbkg kbkk kbko kbkr kbob kboc kboe kbok kboo kbrb kbrc kbre kbrg kbrk kbro kbru kbub kbuc kbue kbuk kbur kbuu kcbc kcbk kcbr kcbu kccb kccc kcck kccr kccu kceb kcec kcee kceg kceo kceu kcgc kcgr kckc kckk kcko kckr kcob kcoe kcog kcor kcou kcrc kcrg kcro kcrr kcru kcub kcue kcuk kebb kebc kebe kebr kebu kecg keck keco kecr keek keer kege kegg kegk kegr kekb kekc keke keko keku keok ker- kerb kerc kere kerk kero kerr keru keug keur kgbb kgbc kgbr kgcb kgcc kgce kgcr kgeb kgec kgeo kggg kggo kggr kgoe kgor kgou kgrb kgrc kgre kgrg kgrk kgro kgrr kkbb kkbe kkbg kkbo kkbr kkcb kkck kkco kkcr kkeg kkgb kkgo kkgr kkkk kkob kkoo kkor kkrb kkrc kkre kkrk kkro kkrr kkuu kobb kobc kobe kobk kobo kobr kobu kocb kock kogb koge kogg kogo kogu kokb kokc koke kokk koko kokr koku koob kooc koog kook kooo koor koou korb korc kore korg kork koro korr koru koub koue kour kouu krbb krbe krbg krbk krbr krcb krcc krce krcg krco krcu kreb krec kree krek kreo kreu krkc krke krkk krko krkr krku krob kroc kroe krog krok kroo kror krrb krrc krre krrg krrk krro krrr kruc krue krug kruk krur kubb kubc kube kubo kubr kubu kucb kucc kuce kuco kucr kuek kueu kugb kuge kugo kugr kuke kukk kuku kuok kuoo kurb kure kurk kuro kurr kuru kuub kuuk kuur kuuu o-eo obbo obec ober obkb oboe obok obor obre obro ocbc occc oce ocee ocke ocre ocro ocrr ocur oec- oecc oeec oegb oere ogb ogbe ogee oger ogge ogog ogou ogre ogro okcu oker okgo okko okok okor okre okro okur oobe oocr ooer ooku oooo oore orbb orbe orbo orbu orce orco ore- oreb orec oreg orek oreo orer orge orgo orke orko oro- oroe orok oror orro orub oucc ouer ouge our- oure ouro ouu- rbbb rbbr rcbc rcbo rccb rccc rcgc rcrg rebb rebe rebk rebo rebu recc rece reck recr recu reeb reek rege rego regr regu reke reko reog reou rere rerg rero reru reue reuk reuu rgbe rob- robb robe robo robu rocc roce rock roco roeg roer roge rogg rogo roke rokk roko rokr roku roob roog rook roor rorc rore rork roro roru roub roue rouk rrrr rubb rube rubu ruce ruck ruer ruge rugg ruke rukk ruku ruok rurc rure ruro ruru ubbe ubbo ubek uber uboc ucbc ucrc ugcc ugcg ugeo uggo ugro ugur uguu ukcc ukek ukeu ukko ukok ukrc ukur uocc uoke uor- uore urbe ure- urge urgu urke uro- urok uroo urre uruk urur uuoc uuuu