bbbb bbbs bbci bbeb bbpr bbrc bcbc bcbp bcbs bccc bcci bccs bcec bcer bces bcie bcis bcpp bcps bcrs bcsc bcss bebb bebe bebi beci becs beeb beep beer bees beic beir beis berc bere beri berr bers bes- bese bess bibb bibe bibi bibs bicc bice bici bics bieb bier bies biis bipp bips birb bire biri birr birs bis- bisc bise bisp biss bpcp bprc brcb brce breb brec bree brei brep brer bres bric brie bris brrr brrs brsb brsr bsci bscp bscs bseb bsec bsee bser bses bsic bspp bspr bssc bsse cbbc cbbs cbcc cbce cbcp cbcr cbcs cbec cbee cber cbir cbpc cbpp cbre cbsc cbse cbsi ccbc cccb cccc ccci cccp cccs ccee ccic ccii ccip ccir ccis ccpe ccpp ccpr ccps ccrc ccre ccri ccrp ccrs ccsi ccsp ccss cebp cebs cec- cece ceci cecp cecs ceeb ceec cees ceip cepc cepe cepp cepr ceps cer- cerc cere ceri cerp cers cesc cese cesi cesp cesr cess cibc cibe cibi cicc cici cicr cics ciee cier cies ciii ciis cipp cips cirb circ cire ciri cirr cirs cis- cisc cise cisp cisr ciss cpbc cpce cpcs cpeb cpep cper cpic cpps cpre cpri cprs cpsc cpsr crbc crcc crce crcr cre- creb crec cree crei crep cres crib cric crie crip cris crpc crps crsp crss cscb cscc csce csci cscr cscs csec csee csep cser csib csir csis cspb cspc cspe cspi csps csrc csrs csse cssr ebbc ebbr ebbs ebcc eber ebes ebic ebis ecbc ecbe eccb eccc ecce ecci eces ecib ecip ecis ecpp ecrc ecri ecrr ecsc ecse ecsp ecss eecs eeee eees eeps eerc eers eese eesi eics eiec eiei eier eies eipr eire eirs eise eiss epcc epci epec epee eper epes epi- epic epie epip epis eppc eppp epps eprb eprp eprs epsc epsi epsp epss erbb erbe ercc erce ercp ereb erec erei erer eres eric erie eris erpe erps errc erre errs erse ersi esbs escb esce esci escr escs esee eser eses esie esis espc espe espi espp esps esri esse essi essp i-be ibcs ibec ibes ibie ibis ibrc ibri ibss icbc icbp icbs iccb iccc icci iccp iccr iccs icec icee icer ices icis icpc icps icrc icre icrr icrs icsb icsc icse icsi icsp icsr icss iecc ieie iere ieri iers iesc iesi iesr iies iiie iiii iiis iirc iirs iisc iisi iisp iisr ipcc ipce ipcs ipec iper ipes ipie ippc ippr ipri ipsc ipse ipsi ipsp ipss irbe irbp ircc ircs iree irer ires iri- iric irie irip iris irpc irpe irps irrc irre irri irrs irse irsp isbe iscc isci iscp iscr iscs iseb isec isee isep iser ises isic isie isis ispc ispe ispr isps isri isrp issc isse issi issp issr isss pbcc pbrs pbsp pcbc pcbs pccc pcce pccs pcep pcer pcip pcpb pcpp pcps pcrc pcre pcse pece peci pecr pecs peec peep peer pees peip peir peis pepe pepi peps per- perc pere peri perp perr pers pese pesi pess pibb pibi picc pice pici picr pics piep pier pies piip pipe pipi pipp pips pirc pire piri pirr pirs pise pisi piss ppcc ppci ppcs pper ppib ppic ppie pppp ppps pprc ppss prbc prbs prcc prcp prcs pre- preb prec pree prep pres pri- prie prii pris prps prri prrs prsc prse prsi prss psbr psci pseb psec psei psip psis pspi pspp pspr psps psrp pssc psse rbbb rbbr rbbs rbis rbsp rbss rcbc rccb rccc rccs rcep rcic rcis rcpi rcps rcsc rcsi rcss rebb rebe rebs recc rece reci recp recr recs reeb reep rees reii reir reis repe repi repp repr reps rere reri rers rese resi resp ress rib- ribe ribs ricc rice rics riep rier ries riis ripe ripi ripp ripr rips rire riri rirs risc rise risi risp riss rpcs rpii rpps rrrr rrsp rsbi rscc rscs rsee rsis rspb rsps rsre s-ib s-ic s-ii sbbs sbcc sbcs sber sbic sbse sbsi sbsp scbi sccc scce sccp sccs scec scee scep scer sci- scic scie scip scir scis scpb scpe scpi scps scr- scrc scre scri scrs scsc scsi scsr se-c se-e se-i se-s sebe sebi sebs sec- secc sece secr secs seeb seec seep seer sees seie seii seip seir seis sepe sepi sepp sepr seps serb serc sere seri serp serr sers sesc sese sesi sess sibc sibe sibi sibs sicc sice sici sicp sics siec sier sies sipc sipe sipi sipp sips sirc sire siri sirp sirr sirs sisc sise sisi siss spcc spcs speb spec spee sper spes spib spic spie spip spir spis spps spri sprs spse spsp spss srbc srcc sreb srec sres srib sris srpc srps srsp ssbr sscc ssce ssci sscp sscs ssec ssee ssep sses ssis sspc sspe ssps ssrc ssri ssrs sssb sssc sssi ssss