bbbb bbeb bbrc bbrg bcbc bcbg bccc bcec bcer bcor bebb bebe bebo beck beeb beeg beek beer begg bego beke beko beo- beok beor berc bere berg berk bero berr bobb bobe bobo boce bock boco boec boee boeo boer boge bogg bogo boke boko boob booc booe boog book boor bor- bore borg bork boro borr brcb brce breb brec bree breg brek breo brer brkb brob broc broe brog brok broo bror brrr c-bo cbbc cbcc cbce cbcr cbec cbee cber cbgb cbkg cbko cbkr cbre ccbc cccb cccc ccee ccgc ccob ccoc ccrc ccre ccrg cec- cece ceco ceeb ceec cege cego ceke ceor cer- cerc cere cero cgcc cgcg cger cgro ckbc ckbe ckck ckco cker ckgo ckob ckoc ckoo ckor ckrc cobb cobe cobo coce cock coco cogo cok- coke coko coob cook cor- corb corc core corg cork coro corr crbc crcc crce crcr cre- creb crec cree creg creo crkc crob croc croe crok croo cror ebbc ebbo ebbr ebcc eber eboe eboo ebor ebro ecbc ecbe eccb eccc ecce ecco ecko eco- ecog ecrc ecrr eeee eeke eeoc eerc eerg eero egbe egcc egcg egcr egec egee eger eggb egge eggo ego- egor egre ekco ekeb ekek eker eore erbb erbe ercc erce ereb erec erer erg- ergg ergo erke erob eroc eroe eroo errc erre erro gbbo gc-c gcbc gccc gcrg gebe gece geck geek geer gege gegg gego geko geo- geog gerb gere gero gggg gobe gobo goce gocr goer gogo goke goog gook goor gorb gore gorg goro gorr grbr grcc grce greb grec gree greg grob groc grog grok groo gror grrr kbbb kbbc kbbe kbbg kbbk kbbo kbbr kbcb kbce kbck kbco kbcr 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 kcbc kcbk kcbr kccb kccc kcck kccr kceb kcec kcee kceg kceo kcgc kcgr kckc kckk kcko kckr kcob kcoe kcog kcor kcrc kcrg kcro kcrr kebb kebc kebe kebr kecg keck keco kecr keek keer kege kegg kegk kegr kekb kekc keke keko keok ker- kerb kerc kere kerk kero kerr kgbb kgbc kgbr kgcb kgcc kgce kgcr kgeb kgec kgeo kggg kggo kggr kgoe kgor 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 kobb kobc kobe kobk kobo kobr kocb kock kogb koge kogg kogo kokb kokc koke kokk koko kokr koob kooc koog kook kooo koor korb korc kore korg kork koro korr krbb krbe krbg krbk krbr krcb krcc krce krcg krco kreb krec kree krek kreo krkc krke krkk krko krkr krob kroc kroe krog krok kroo kror krrb krrc krre krrg krrk krro krrr o-eo obbo obec ober obkb oboe obok obor obre obro ocbc occc oce ocee ocke ocre ocro ocrr oec- oecc oeec oegb oere ogb ogbe ogee oger ogge ogog ogre ogro oker okgo okko okok okor okre okro oobe oocr ooer oooo oore orbb orbe orbo orce orco ore- oreb orec oreg orek oreo orer orge orgo orke orko oro- oroe orok oror orro rbbb rbbr rcbc rcbo rccb rccc rcgc rcrg rebb rebe rebk rebo recc rece reck recr reeb reek rege rego regr reke reko reog rere rerg rero rgbe rob- robb robe robo rocc roce rock roco roeg roer roge rogg rogo roke rokk roko rokr roob roog rook roor rorc rore rork roro rrrr