-ene bbbb bbbs bbeb bbrc bcbc bcbs bccc bccs bcec bcer bces bcnu bcrs bcru bcsc bcsn bcss bcuc bebb bebe beck becs becu beeb beek been beer bees beke beks bene benk benn bens benu berc bere berk bern berr bers beru bes- bese besk bess beuk beur bner bnrr bnss brcb brce breb brec bree brek bren brer bres brkb brns brrr brrs brsb brsr bruc brue brun brus bscs bseb bsec bsee bser bses bsns bssc bsse bubb bube bubs bubu bucc buce buck bucs bucu buen buer bueu buke bukk buku bunb bune bunk bunn buns bunu bur- burb bure burk burn burr burs buru busc buse busk buss busu buus cbbc cbbs cbcc cbce cbcn cbcr cbcs cbcu cbec cbee cber cbkn cbkr cbre cbrn cbsc cbse cbsn cbus ccbc ccbn cccb cccc cccs cccu ccee ccnb ccnc ccne ccnr ccns ccnu ccrc ccre ccrs ccsn ccss ccuc ccus cebs cebu cec- cece cecs ceeb ceec cees ceke cen- cene cens cer- cerc cere cern cers cesc cese cesr cess ckbc ckbe ckck ckcs cken cker cknb cknc ckns ckrc cksb cnbc cnes cnrc cnrr cnss crbc crbu crcc crce crcr cre- creb crec cree cren cres creu crkc crne crns crss crub crue cruk crun crus cscb cscc csce cscr cscs csec csee cser csks csne csrc csrs csse cssr csur csus cub- cubb cube cubs cucc cuce cuck cucn cuek cuer cues cuk- cuke cune curb cure curn curr curs cusb cusk cuss cusu ebbc ebbr ebbs ebcc eben eber ebes ebru ebur ebus ecbc ecbe eccb eccc ecce eces ecks ecne ecrc ecrr ecru ecsc ecse ecss ecsu ecus eecs eeee eees eeke eeks eens eerc eers eese eesk ekeb ekek eken eker ekes ekne ekur enb- enbn enbr ence encs enee ener enes enke enkr ennc enne enns ennu enrs ense ensu enue enur enus erbb erbe ercc erce ereb erec eren erer eres erke erks erne erns errc erre errs erse erub eruc erur erus esbs escb esce escr escs escu esee esek esen eser eses eske esks esku esne esse essu esus eubc euer eur- eurc eure euse kbbb kbbc kbbe kbbk kbbr kbbs kbbu kbcb kbce kbck kbcr kbcs kbcu kbeb kbec kbee kbek kben kber kbes kbkb kbkk kbkr kbnn kbnr kbnu kbrb kbrc kbre kbrk kbrn kbru kbsb kbsk kbsn kbsr kbss kbsu kbub kbuc kbue kbuk kbun kbur kbus kbuu kcbc kcbk kcbr kcbs kcbu kccb kccc kcck kccr kccu kceb kcec kcee kceu kckc kckk kckn kckr kcnb kcnr kcns kcrc kcrn kcrr kcrs kcru kcsb kcsc kcse kcsn kcsr kcss kcsu kcub kcue kcuk kebb kebc kebe kebn kebr kebu keck kecr keek keen keer kees kekb kekc keke keks keku ken- kene kenk kenn kenr kens kenu ker- kerb kerc kere kerk kern kerr kers keru kesb kesc kesk kesn kesr kess keun keur keus kkbb kkbe kkbn kkbr kkbs kkcb kkck kkcn kkcr kkcs kken kkkk kknb kkne kknn kkns kknu kkrb kkrc kkre kkrk kkrn kkrr kkrs kkse kksn kksr kkss kksu kkus kkuu knbb knbc knbe knbn knbr knbu kncb knce knck kncn kncr kncu kneb knec knee knek knen knes kneu knkk knnb knnk knnr knns knrb knrk knrs knsb knsc knse knsk knsn knsr knss knsu knub knue knuk knur knus krbb krbe krbk krbr krcb krcc krce krcn krcs krcu kreb krec kree krek kren kres kreu krkc krke krkk krkn krkr krks krku krnb krne krnk krnn krnu krrb krrc krre krrk krrn krrr krrs krsc krse krsk krsn krsr krss krsu kruc krue kruk krun krur ksbc ksbn ksbr ksbs kscb ksce ksck kscn kscr kscs kscu ksec ksee ksek ksen kser kskb kske kskk kskn kskr ksks ksku ksnb ksnc ksnk ksnn ksnr ksns ksrb ksrn ksrr ksrs ksse kssn kssr ksss kssu ksub ksue ksun ksuu kubb kubc kube kubr kubs kubu kucb kucc kuce kucr kuek kuen kues kueu kuke kukk kukn kuks kuku kunc kune kunk kunr kuns kunu kurb kure kurk kurr kurs kuru kusb kusc kusn kusu kuub kuuk kuur kuuu nbbc nbcc nbcs nber ncbc ncbs nccc nccn nccr nccs nccu ncec ncee ncen ncer nces ncnc ncrc ncre ncsc ncse ncss ncue ncuk nebb nebe nebn nebr nebs nebu necc nece neck necr necs neeb neen neer nees neke neku nene nens nenu nerc nere nerk nerr ners neru nesb nesc nese nesn nesr ness neuc neue neuk neun neur neuu nnes nnnn nnss nrcs nren nrrc nrsc nscc nscs nseb nsec nser nskk nsnr nsrc nssb nssc nsse nssr nsss nsub nubc nube nubk nubs nuce nuck nucs nucu nuee nuer nuke nuku nunc nune nunk nunn nuns nurc nure nurn nurr nurs nuru nuse nuss nusu nuuk rbbb rbbr rbbs rbss rcbc rccb rccc rccs rcnr rcsc rcss rebb rebe rebk rebs rebu recc rece reck recr recs recu reeb reek reen rees reke reks rene renk renn rens renu rere rers reru rese resn ress reue reuk reus reuu rkss rnbr rncs rrrr rrun rscc rscn rscs rsee rsnn rsnr rsre rubb rube rubs rubu ruce ruck ruen ruer rues ruke rukk rukn ruku runc rune runk runn runs rurc rure rurs ruru ruse rusk russ rusu ruun sbbs sbcc sbcs sber sbrk sbse sbus sccc scce sccs scec scee scer sck- scnr scr- scrc scre scrn scrs scsc scsn scsr scsu scub scun scur se-c se-e se-k se-n se-s se-u sebe sebs sec- secc sece seck secn secr secs secu seeb seec seek seen seer sees seeu seke sekk seku sene senn senr sens serb serc sere serk sern serr sers seru sesc sese sess seur skee sken sker skes skn- skss skue skun skur sncc sneb snee sner snes snns snrk snrs snub snur snus srbc srcc sreb srec sres srnn srub ssbn ssbr sscc ssce sscs ssec ssee sses ssns ssrc ssrs sssb sssc ssss sub- subb subs suc- succ suck sucr sucs suee suen suer sues sueu suke suks