bbbb bbeb bblb bbrc bcbc bccc bccl bcec bcer bcor bebb bebe bebo beck beeb beek beel beer beke beko bele belk bell belo beo- beok beor berc bere berk bero berr bleb blee blek bleo blkb blob bloc blok bloo blrc bobb bobe bobo boce bock boco boec boee boel boeo boer boke boko bole bolk boll bolo boob booc booe book bool boor bor- bore bork boro borr brcb brce breb brec bree brek brel breo brer brkb brob broc broe brok brol broo bror brrr c-bo cbbc cbcc cbce cbcl cbcr cbec cbee cber cbkl cbko cbkr cblb cblc cbol cbre cbrl ccbc cccb cccc cccl ccee ccel cclc ccob ccoc ccrc ccre ccrl cec- cece ceco ceeb ceec ceel ceke cel- celc cele cell celo ceol ceor cer- cerc cere cerl cero ckbc ckbe ckck ckcl ckco cker ckob ckoc ckoo ckor ckrc clec clee clek cleo cler clob cloe clok cloo clor clro cobb cobe cobo coce cock coco coel cok- coke coko col- colb cole colk coll colo coob cook cool cor- corb corc core cork corl coro corr crbc crcc crce crcr cre- creb crec cree creo crkc crkl crob croc croe crok crol croo cror e-cl ebbc ebbo ebbr ebcc ebel eber eboe ebol eboo ebor ebro ecbc ecbe eccb eccc ecce eccl ecco ecko eco- ecol ecrc ecrl ecrr eeee eeke eele eeoc eerc eero ekco ekeb ekek eker el-b elbe elbo elcb elce elco elec elee elek eleo eler elke elko elle ello elok elro eole eolo eore eorl erbb erbe ercc erce ereb erec erel erer erke erle erll erob eroc eroe erol eroo errc erre erro k-lo kbbb kbbc kbbe kbbk kbbl kbbo kbbr kbcb kbce kbck kbcl kbco kbcr kbeb kbec kbee kbek kbel kbeo kber kbkb kbkk kbkl kbko kbkr kblb kble kbll kblo kblr kbob kboc kboe kbok kboo kbrb kbrc kbre kbrk kbrl kbro kcbc kcbk kcbl kcbr kccb kccc kcck kccl kccr kceb kcec kcee kcel kceo kckc kckk kckl kcko kckr kclc kcle kclk kcll kclr kcob kcoe kcol kcor kcrc kcro kcrr kebb kebc kebe kebr keck keco kecr keek keel keer kekb kekc keke kekl keko kele kelk kell kelo keok keol ker- kerb kerc kere kerk kerl kero kerr kkbb kkbe kkbl kkbo kkbr kkcb kkck kkcl kkco kkcr kkkk kklb kklc kkll kklo kkob kkol kkoo kkor kkrb kkrc kkre kkrk kkrl kkro kkrr klbb klbc klbe klbl klcb klcc klce klck klcl klcr kleb klec klee klek kleo kler klkc klkk klkl klko klkr kllb kllc klle kllk klob kloc kloe klok klol kloo klor klrc klrk klrr kobb kobc kobe kobk kobo kobr kocb kock koel kokb kokc koke kokk koko kokr kolb kolc kole kolk koll kolo kolr koob kooc kook kool kooo koor korb korc kore kork korl koro korr krbb krbe krbk krbl krbr krcb krcc krce krcl krco kreb krec kree krek kreo krkc krke krkk krko krkr krlc krle krob kroc kroe krok krol kroo kror krrb krrc krre krrk krrl krro krrr lbcc lblr lcbc lccc lcce lcer lcor lcrl lebo lece leck leco leek leel leer leke lekk leko lele lell lelo leoc leok leor lerc lere lerk lero llcc lllc llll lloc lloo lob- lobb lobe lobo locc loce lock loco loeb loke lokk loko lole loll lolo loob looc looe look lool loor lore lork loro lroc lrrc lrrr o-eo obbo obec obel ober obkb oble oboe obok obol obor obre obro ocbc occc oce ocee ocke oclc ocre ocrl ocro ocrr oec- oecc oeec oele oere oker okko oklo okok okol okor okre okro olbo olcc ole- oleo oler olle ollo olor oobe oocr ooer oolo oooo oore orbb orbe orbo orce orco ore- oreb orec orek orel oreo orer orke orko orle orlo oro- oroe orok oror orro rbbb rbbr rbcl rble rcbc rcbo rccb rccc rcle rebb rebe rebk rebo recc rece reck recr reeb reek reel reke reko relb rele rell relo reol rere rero rlee rob- robb robe robo rocc roce rock roco roel roer roke rokk roko rokr role rolk roll rolo roob rook rool roor rorc rore rork roro rrle rrrr