-er bbb bbc bbe bbg bbk bbo bbr bcb bcc bce bcg bck bco bcr be- beb bec bee beg bek beo ber bgb bgc bge bgg bgk bgo bgr bkb bkc bke bkg bkk bko bkr bob boc boe bog bok boo bor brb bre brg brk bro brr c-- cbb cbc cbe cbg cbk cbo cbr ccb ccc cce ccg cck cco ccr ce- ceb cec cee ceg cek ceo cer cgb cgc cge cgg cgo cgr ckb ckc cko co- cob coc coe cog cok coo cor crb crc cre crg crk cro crr ebb ebc ebe ebg ebk ebo ebr ec- ecb ecc ece ecg eck eco ecr eeb eec eee eeg eek eeo eer egb egc ege egg ego egr ekb ekc eke ekg eko ekr eo- eob eoc eoe eog eok eoo eor erb erc ere erg erk ero err gbc gbe gbg gbk gbo gbr gcb gcc gce gcg gck gco gcr ge- geb gec gee geg gek geo ger ggb ggc ggg ggo ggr gkb gko gob goc goe gog gok goo gor grb grc gre grg grk gro grr kbb kbc kbe kbk kbo kbr kcb kcc kce kcg kck kcr ke- keb kec kee keg kek keo ker kgb kgc kgo kkb kkc kke kkk kkr kob koc koe kog kok koo kor krc krg krk kro krr ob- obb obc obe obg obk obo obr oc- ocb occ ocg ock oco ocr oeb oec oee oeg oeo oer ogc oge ogg ogo okb okc oke okg okk oko okr oo- oob ooc oog ook ooo oor or- orb orc ore org ork oro orr rbb rbc rbe rbg rbk rbo rbr rcb rcc rce rcg rco rcr re- reb rec ree reg rek reo rer rgb rgc rge rgg rgk rgo rgr rkb rkc rke rkg rkk rko rob roc roe rog rok roo ror rrb rrc rrg rrk rrr

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

b-r-k bbbee bbook bcock be-er be-ro bebek beber bebog becco becke beebe beeke begee begge begob begor beker bekke bekko bekok berbe berck berec bereg berek berge berk- berke berko berob beroe berok beror berre bo-bo bobek bobko boboc bobok bobr bobre bocce bocke bocor boece boeck boege boeke boero boger bogge bogoe bogor bokeo boker bokko bokok bokor booce boock booco booer booke booko boore borbo borce borck borec boree borek borer borge borgo borko boro- borok boroo borre borro brcko brece breck breek