-er -ic b-u bbb bbc bbe bbi bbr bbs bbu bcb bcc bce bci bcr bcs bcu be- beb bec bee bei ber bes beu bi- bib bic bie bii bir bis biu brb bre bri brr brs bru bsb bsc bse bsi bsr bss bsu bub buc bue bui bur bus buu c-- cbb cbc cbe cbi cbr cbs cbu ccb ccc cce cci ccr ccs ccu ce- ceb cec cee cei cer ces ceu ci- cib cic cie cii cir cis ciu crb crc cre cri crr crs cru csb csc cse csi csr css csu cub cuc cue cui cur cus cuu ebb ebc ebe ebi ebr ebs ebu ec- ecb ecc ece eci ecr ecs ecu eeb eec eee eer ees eib eic eie eii eir eis eiu erb erc ere eri err ers eru es- esb esc ese esi esr ess esu eu- eub euc eue eui eur eus ibb ibc ibe ibi ibr ibs ibu icb icc ice ici icr ics icu ie- iec iee iei ier ies iib iic iie iii iir iis iiu ir- irb irc ire iri irr irs iru is- isb isc ise isi isr iss isu iu- iub iuc iue iui iur ius rbb rbc rbe rbi rbr rbs rbu rcb rcc rce rci rcr rcs rcu re- reb rec ree rei rer res reu rib ric rie rii rir ris rrb rrc rri rrr rrs rru rsb rsc rse rsi rsr rss rsu rub ruc rue rui rur rus ruu sbb sbc sbe sbi sbr sbs sbu scb scc sce sci scr scs scu se- seb sec see sei ser ses seu sib sic sie sii sir sis siu sr- srb src sre sri srr srs ss- ssb ssc sse ssi ssr sss ssu sub suc sue sui sur sus suu ubb ubc ube ubi ubr ubs ubu ucb ucc uce uci ucr ucs ucu ueb uec uee uei uer ues uib uic uie uii uir uis uiu ur- urb urc ure uri urr urs uru usb usc use usi usr uss usu uuc uue uur uus uuu

bbbb bbbs bbci bbeb bbrc bcbc bcbs bccc bcci bccs bcec bcer bces bcie bcis bcrs bcru bcsc bcss bcuc bebb bebe bebi beci becs becu beeb beer bees beic beir beis berc bere beri berr bers beru bes- bese bess beur bibb bibe bibi bibs bicc bice bici bics bieb bier bies bieu biis birb bire biri birr birs biru bis- bisc bise biss bisu brcb brce breb brec bree brei brer bres bric brie bris brrr brrs brsb brsr bruc brue brus bsci bscs bseb bsec bsee bser bses bsic bssc bsse bubb bube bubi bubs bubu bucc buce buci bucs bucu buer bueu buic buie buir buis buiu bur- burb bure buri burr burs buru busc buse busi buss busu buus cbbc cbbs cbcc cbce cbcr cbcs cbcu cbec cbee cber cbir cbre cbsc cbse cbsi cbus ccbc cccb cccc ccci cccs cccu ccee ccic ccii ccir ccis ccrc ccre ccri ccrs ccsi ccss ccuc ccus cebs cebu cec- cece ceci cecs ceeb ceec cees cer- cerc cere ceri cers cesc cese cesi cesr cess ceui cibc cibe cibi cicc cici cicr cics cicu ciee cier cies ciii ciis cirb circ cire ciri cirr cirs cis- cisc cise cisr ciss ciuc cius crbc crbu crcc crce crcr cre- creb crec cree crei cres creu crib cric crie cris criu crss crub crue crus cscb cscc csce csci cscr cscs csec csee cser csib csir csis csrc csrs csse cssr csur csus cub- cubb cube cubi cubs cucc cuce cuci cuer cues cui- cuir cuis curb cure curi curr curs cusb cuss cusu ebbc ebbr ebbs ebcc eber ebes ebic ebis ebru ebur ebus ecbc ecbe eccb eccc ecce ecci eces ecib ecis ecrc ecri ecrr ecru ecsc ecse ecss ecsu ecus eecs eeee eees eerc eers eese eesi eics eiec eiei eier eies eire eirs eise eiss erbb erbe ercc erce ereb erec erei erer eres eric erie eris eriu errc erre errs erse ersi erub eruc erur erus esbs escb esce esci escr escs escu esee eser eses esie esis esri esse essi essu esui esus eubc eubi euer eur- eurc eure euse i-be ibcs ibec ibes ibie ibis ibrc ibri ibss ibus icbc icbs iccb iccc icci iccr iccs iccu icec icee icer ices icis icrc icre icrr icrs icru icsb icsc icse icsi icsr icss icub icue icus iecc ieie iere ieri iers iesc iesi iesr iesu iies iiie iiii iiis iirc iirs iisc iisi iisr iisu iiuc irbe ircc ircs ircu iree irer ires iri- iric irie iris irrc irre irri irrs irse irus isbe iscc isci iscr iscs iscu iseb isec isee iser ises isic isie isis isri issc isse issi issr isss issu isus iucc iuce iuiu iuse iuss rbbb rbbr rbbs rbis rbss rcbc rccb rccc rccs rcic rcis rcsc rcsi rcss rebb rebe rebs rebu recc rece reci recr recs recu reeb rees reii reir reis reiu rere reri rers reru rese resi ress reue reus reuu rib- ribe ribs ribu ricc rice rics rier ries rieu riis rire riri rirs risc rise risi riss risu riue rius rrrr rsbi rscc rscs rsee rsis rsre rubb rube rubi rubs rubu ruce ruci ruer rues ruis rurc rure ruri rurs ruru ruse rusi russ rusu s-ib s-ic s-ii sbbs sbcc sbcs sber sbic sbse sbsi sbus scbi sccc scce sccs scec scee scer sci- scic scie scir scis scr- scrc scre scri scrs scsc scsi scsr scsu scub scur se-c se-e se-i se-s se-u sebe sebi sebs sec- secc sece secr secs secu seeb seec seer sees seeu seie seii seir seis seiu serb serc sere seri serr sers seru sesc sese sesi sess seui seur sibc sibe sibi sibs sibu sicc sice sici sics sicu siec sier sies sirc sire siri sirr sirs siru sisc sise sisi siss sisu siue siui sius srbc srcc sreb srec sres srib sris