bbbb bbbs bbeb bbpr bbrc bcbc bcbp bcbs bccc bccs bcec bcer bces bcpp bcps bcrs bcru bcsc bcss bcuc bcup bebb bebe becs becu beeb beep beer bees berc bere berr bers beru bes- bese bess beur bpcp bprc bpsu brcb brce breb brec bree brep brer bres brrr brrs brsb brsr bruc brue brup brus bscp bscs bseb bsec bsee bser bses bspp bspr bssc bsse bsup bubb bube bubs bubu bucc buce bucs bucu buer bueu bupc bups bur- burb bure burp burr burs buru busc buse buss busu buus cbbc cbbs cbcc cbce cbcp cbcr cbcs cbcu cbec cbee cber cbpc cbpp cbre cbsc cbse cbus ccbc cccb cccc cccp cccs cccu ccee ccpe ccpp ccpr ccps ccrc ccre ccrp ccrs ccsp ccss ccuc ccup ccus cebp cebs cebu cec- cece cecp cecs ceeb ceec cees cepc cepe cepp cepr ceps cer- cerc cere cerp cers cesc cese cesp cesr cess cpbc cpce cpcs cpcu cpeb cpep cper cpps cpre cprs cpsc cpsr cpsu cpus crbc crbu crcc crce crcr cre- creb crec cree crep cres creu crpc crps crsp crss crub crue crup crus cscb cscc csce cscr cscs csec csee csep cser cspb cspc cspe csps csrc csrs csse cssr csup csur csus cub- cubb cube cubs cucc cuce cuer cues cupe cupp cupr cups curb cure curr curs cusb cusp cuss cusu ebbc ebbr ebbs ebcc eber ebes ebru ebur ebus ecbc ecbe eccb eccc ecce eces ecpp ecrc ecrr ecru ecsc ecse ecsp ecss ecsu ecus eecs eeee eees eeps eerc eers eese epcc epec epee eper epes eppc eppp epps eprb eprp eprs epsc epsp epss epub epus erbb erbe ercc erce ercp ereb erec erer eres erpe erps errc erre errs erse erub eruc erur erus esbs escb esce escr escs escu esee eser eses espc espe espp esps esse essp essu esus eubc euer eur- eurc eure euse pbcc pbrs pbsp pcbc pcbs pccc pcce pccs pcep pcer pcpb pcpp pcps pcrc pcre pcse pece pecr pecs peec peep peer pees pepe peps per- perc pere perp perr pers peru pese pess pesu peur ppcc ppcs pper pppp ppps pprc ppru ppss ppur prbc prbs prcc prcp prcs pre- preb prec pree prep pres preu prps prrs prsc prse prss prue prus pruu psbr pscu pseb psec pspp pspr psps psrp pssc psse pu-e pube pubs pubu puce puer pueu pupe pups pupu pur- purb pure purp purr purs puru puss puuc rbbb rbbr rbbs rbsp rbss rcbc rccb rccc rccs rcep rcps rcsc rcss rebb rebe rebs rebu recc rece recp recr recs recu reeb reep rees repe repp repr reps repu rere rers reru rese resp ress reue reup reus reuu rpcs rpps rrrr rrsp rscc rscs rsee rspb rsps rsre rubb rube rubp rubs rubu ruce ruer rues rupe rupp rurc rure rurp rurs ruru ruse russ rusu sbbs sbcc sbcs sber sbse sbsp sbus sccc scce sccp sccs scec scee scep scer scpb scpe scps scr- scrc scre scrs scsc scsr scsu scub scup scur se-c se-e se-s se-u sebe sebs sec- secc sece secr secs secu seeb seec seep seer sees seeu sepe sepp sepr seps sepu serb serc sere serp serr sers seru sesc sese sess seur spcc spcs speb spec spee sper spes spps sprs spse spsp spss spue spur spus srbc srcc sreb srec sres srpc srps srsp srub ssbr sscc ssce sscp sscs ssec ssee ssep sses sspc sspe ssps ssrc ssrs sssb sssc ssss sub- subb subs suc- succ sucr sucs suee suer sues sueu sup- supe supp supr sups sur- surc sure surp surr surs suru sus- suse susp suss susu suus u-rp ubbe uber ubpc ucbc uccp uces ucpb ucrc ucsb ucsc ucsu uers uess upbe upcs uppc uppe uppp uppu upsc upse upup urbe urbs ure- ures urre urse urss ursu urup urur urus usbc usbe usbr usbs uscc usce uscs usee user uses uspc uspp usps ussb ussc usse ussr usss ussu usus uucp uuuu