-er bbb bbc bbe bbk bbo bbr bbx bcb bcc bce bck bco bcr bcx be- beb bec bee bek beo ber bex bkb bkc bke bkk bko bkr bkx bob boc boe bok boo bor box brb bre brk bro brr brx bxb bxo bxx c-- cbb cbc cbe cbk cbo cbr cbx ccb ccc cce cck cco ccr ccx ce- ceb cec cee cek ceo cer cex ckb ckc cko ckx co- cob coc coe cok coo cor cox crb crc cre crk cro crr crx cxc cxk cxo cxr cxx ebb ebc ebe ebk ebo ebr ebx ec- ecb ecc ece eck eco ecr ecx eeb eec eee eek eeo eer eex ekb ekc eke eko ekr eo- eob eoc eoe eok eoo eor erb erc ere erk ero err ex- exc exe exo exr exx kbb kbc kbe kbk kbo kbr kbx kcb kcc kce kck kcr kcx ke- keb kec kee kek keo ker kex kkb kkc kke kkk kkr kob koc koe kok koo kor krc krk kro krr kxo ob- obb obc obe obk obo obr obx oc- ocb occ ock oco ocr ocx oeb oec oee oeo oer oex okb okc oke okk oko okr oo- oob ooc ook ooo oor oox or- orb orc ore ork oro orr orx ox- oxb oxc oxo oxx rbb rbc rbe rbk rbo rbr rbx rcb rcc rce rco rcr rcx re- reb rec ree rek reo rer rex rkb rkc rke rkk rko rob roc roe rok roo ror rox rrb rrc rrk rrr rxr xbc xbe xbr xbx xcb xcr xcx xee xer xex xkb xke xoc xok xoo xor xox xrc xrx xxo xxx

bbbb bbeb bbox bbrc bcbc bccc bcec bcer bcor bebb bebe bebo beck beeb beek beer beke beko beo- beok beor berc bere berk bero berr bobb bobe bobo boce bock boco boec boee boeo boer boke boko boob booc booe book boor boox bor- bore bork boro borr brcb brce breb brec bree brek breo brer brex brkb brob broc broe brok broo bror brox brrr c-bo cbbc cbcc cbce cbcr cbec cbee cber cbko cbkr cbox cbre ccbc cccb cccc ccee ccob ccoc ccrc ccre cec- cece ceco ceeb ceec ceke ceor cer- cerc cere cero cexe ckbc ckbe ckbx ckck ckco ckcx cker ckob ckoc ckoo ckor ckrc cobb cobe cobo coce cock coco coex cok- coke coko coob cook cor- corb corc core cork coro corr coxe crbc crcc crce crcr cre- creb crec cree creo crex crkc crob croc croe crok croo cror cxro cxxx ebbc ebbo ebbr ebcc eber eboe eboo ebor ebox ebro ecbc ecbe eccb eccc ecce ecco ecko eco- ecrc ecrr eeee eeke eeoc eerc eero ekco ekeb ekek eker eore er-x erbb erbe ercc erce ereb erec erer erke erob eroc eroe eroo errc erre erro exco exec exer exo- exor exrx kbbb kbbc kbbe kbbk kbbo kbbr kbcb kbce kbck kbco kbcr kbeb kbec kbee kbek kbeo kber kbex kbkb kbkk kbko kbkr kbob kboc kboe kbok kboo kbox kbrb kbrc kbre kbrk kbro kbrx kbxb kbxr kbxx kc-x kcbc kcbk kcbr kcbx kccb kccc kcck kccr kceb kcec kcee kceo kckc kckk kcko kckr kckx kcob kcoe kcor kcox kcrc kcro kcrr kcrx kcxr kebb kebc kebe kebr keck keco kecr keek keer kekb kekc keke keko keok ker- kerb kerc kere kerk kero kerr kerx kexb kexo kexx kkbb kkbe kkbo kkbr kkcb kkck kkco kkcr kkex kkkk kkob kkoo kkor kkrb kkrc kkre kkrk kkro kkrr kkrx kkxk kkxx kobb kobc kobe kobk kobo kobr kocb kock kokb kokc koke kokk koko kokr kokx koob kooc kook kooo koor korb korc kore kork koro korr koxc koxe koxr krbb krbe krbk krbr krbx krcb krcc krce krco kreb krec kree krek kreo krex krkc krke krkk krko krkr krkx krob kroc kroe krok kroo kror krox krrb krrc krre krrk krro krrr krrx krxb krxk krxo krxr krxx kxbr kxbx kxeo kxex kxkc kxkk kxkx kxok kxoo kxor kxox kxrb kxrc kxre kxrk kxro kxrr kxrx kxxe kxxk kxxo kxxr kxxx o-eo obbo obec ober obex obkb oboe obok obor obox obre obro ocbc occc oce ocee ocke ocre ocro ocrr oec- oecc oeec oere oker okko okok okor okre okro oobe oocr ooer oooo oore orbb orbe orbo orce orco ore- oreb orec orek oreo orer orex orke orko oro- oroe orok oror orro oxer oxo- oxox oxxo rbbb rbbr rcbc rcbo rccb rccc rebb rebe rebk rebo recc rece reck recr reeb reek reke reko rere rero rexx rob- robb robe robo rocc roce rock roco roer roke rokk roko rokr roob rook roor roox rorc rore rork roro roxo rrrr xbee xbox xeer xeko xer- xero xexe xobc xoco xoro xoxo xxxo xxxx

b-r-k bbbee bbook bcock be-er be-ro bebek beber bebox becco becke beebe beeke beker bekke bekko bekok berbe berck berec berek berk- berke berko berob beroe berok beror berre bo-bo bobek bobko boboc bobok bobr bobre bocce bocke bocor boece boeck boeke boero bokeo boker bokko bokok bokor booce boock booco booer booke booko boore borbo borce borck borec boree borek borer borex borko boro- borok boroo borox borre borro boxbe boxee boxer brcko bre-x brece breck breek breer breke breo- breoc brere brobo broce brock broek broer broke brook brrrr c-cor ccccc cebec ceber ceco- ceere ceoce ceoor cerc- cerce cerco cerec cerer cerke cero- ceroc cerre cerro co-bo co-co cobbe cobre cocc- cocce cocco coceo cocke cockx coker cokk- cooee cooer cooke coore corbe corbo corce core- coree corer corex corke coro- corre crebe crece creek creer creke creo- croce crock croco croke crooe crook crore e-box ebber ebeko ebook ecker eecke eeeee ekeko ekker eorre erbbe erber erere erkec erkko erkoc eroor erore error execx exorb exore k-box k-rob kebbe kebek keber kebob kecer keere kekec kerek kerre kexec kkbox ko-ko kobee kober kocek kocer kocke koker kokko kokor kokre korbe korbo korck korec korek