-er -ic b-u bbb bbc bbe bbi bbk bbr bbs bbu bcb bcc bce bci bck bcr bcs bcu be- beb bec bee bei bek ber bes beu bi- bib bic bie bii bik bir bis biu bkb bkc bke bkk bkr bks brb bre bri brk brr brs bru bsb bsc bse bsi bsk bsr bss bsu bub buc bue bui buk bur bus buu c-- cbb cbc cbe cbi cbk cbr cbs cbu ccb ccc cce cci cck ccr ccs ccu ce- ceb cec cee cei cek cer ces ceu ci- cib cic cie cii cik cir cis ciu ckb ckc cki cks crb crc cre cri crk crr crs cru csb csc cse csi csk csr css csu cub cuc cue cui cuk cur cus cuu ebb ebc ebe ebi ebk ebr ebs ebu ec- ecb ecc ece eci eck ecr ecs ecu eeb eec eee eek eer ees eib eic eie eii eik eir eis eiu ekb ekc eke eki ekr eks eku erb erc ere eri erk err ers eru es- esb esc ese esi esk esr ess esu eu- eub euc eue eui eur eus ibb ibc ibe ibi ibk ibr ibs ibu icb icc ice ici ick icr ics icu ie- iec iee iei iek ier ies iib iic iie iii iir iis iiu ikb ikc ike iki ikk ikr iks iku ir- irb irc ire iri irk irr irs iru is- isb isc ise isi isk isr iss isu iu- iub iuc iue iui iur ius kbb kbc kbe kbi kbk kbr kbs kbu kcb kcc kce kci kck kcr kcs kcu ke- keb kec kee kei kek ker kes kib kic kie kii kik kir kis kiu kkb kkc kke kki kkk kkr kks kku krc kri krk krr krs kru ksb ksc kse ksi ksk ksr kss ksu kub kuc kue kui kuk kur kus kuu rbb rbc rbe rbi rbk rbr rbs rbu rcb rcc rce rci rcr rcs rcu re- reb rec ree rei rek rer res reu rib ric rie rii rik rir ris rkb rkc rke rkk rks rku rrb rrc rri rrk rrr rrs rru rsb rsc rse rsi rsk rsr rss rsu rub ruc rue rui ruk rur rus ruu sbb sbc sbe sbi sbk sbr sbs sbu scb scc sce sci sck scr scs scu se- seb sec see sei sek ser ses seu sib sic sie sii sik sir sis siu sk- skb skc ske ski skk skr sks sku sr- srb src sre sri srk srr srs ss- ssb ssc sse ssi ssk ssr sss ssu sub suc sue sui suk sur sus suu ubb ubc ube ubi ubk ubr ubs ubu ucb ucc uce uci uck ucr ucs ucu ueb uec uee uei uer ues uib uic uie uii uir uis uiu ukb ukc uke uki ukk ukr uku ur- urb urc ure uri urk urr urs uru usb usc use usi usk 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 beck becs becu beeb beek beer bees beic beik beir beis beke beki beks berc bere beri berk berr bers beru bes- bese besk bess beuk beur bibb bibe bibi bibs bicc bice bici bick bics bieb bier bies bieu biis bike biku birb bire biri birk birr birs biru bis- bisc bise bisk biss bisu brcb brce breb brec bree brei brek brer bres bric brie brik bris brkb 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 buck bucs bucu buer bueu buic buie buik buir buis buiu buke buki bukk buku bur- burb bure buri burk burr burs buru busc buse busi busk buss busu buus cbbc cbbs cbcc cbce cbcr cbcs cbcu cbec cbee cber cbir cbkr 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 ceke cer- cerc cere ceri cers cesc cese cesi cesr cess ceui cibc cibe cibi cicc cici cicr cics cicu ciee cier cies ciii ciis cikr cirb circ cire ciri cirk cirr cirs cis- cisc cise cisk cisr ciss ciuc cius ckbc ckbe ckbi ckck ckcs cker ckrc cksb crbc crbu crcc crce crcr cre- creb crec cree crei cres creu crib cric crie crik cris criu crkc crss crub crue cruk crus cscb cscc csce csci cscr cscs csec csee cser csib csik csir csis csks csrc csrs csse cssr csur csus cub- cubb cube cubi cubs cucc cuce cuci cuck cuek cuer cues cui- cuir cuis cuk- cuke curb cure curi curr curs cusb cusk cuss cusu ebbc ebbr ebbs ebcc eber ebes ebic ebis ebru ebur ebus ecbc ecbe eccb eccc ecce ecci eces ecib ecis ecks ecrc ecri ecrr ecru ecsc ecse ecss ecsu ecus eecs eeee eees eeke eeks eerc eers eese eesi eesk eick eics eiec eiei eier eies eike eiki eiks eire eirs eise eisk eiss ekeb ekek eker ekes ekis ekki eksi ekur erbb erbe ercc erce ereb erec erei erer eres eric erie erik eris eriu erke erki erks errc erre errs erse ersi erub eruc erur erus esbs escb esce esci escr escs escu esee esek eser eses esie esik esis eske esks esku 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 icke icks 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 ikee iker ikes ikki ikri iksu ikue irbe ircc