-er a-a a-b a-c aaa aab aac aae aar aas aau ab- aba abb abc abe abr abs abu ac- aca acb acc ace acr acs acu aea aeb aec aee aer aes aeu ar- ara arb arc are arr ars aru as- asa asb asc ase asr ass asu au- aua aub auc aue aur aus b-u baa bab bac bae bar bas bau bba bbb bbc bbe bbr bbs bbu bca bcb bcc bce bcr bcs bcu be- bea beb bec bee ber bes beu bra brb bre brr brs bru bsa bsb bsc bse bsr bss bsu bua bub buc bue bur bus buu c-- caa cab cac cae car cas cau cba cbb cbc cbe cbr cbs cbu cca ccb ccc cce ccr ccs ccu ce- cea ceb cec cee cer ces ceu cra crb crc cre crr crs cru csa csb csc cse csr css csu cua cub cuc cue cur cus cuu eaa eab eac eae ear eas eau eba ebb ebc ebe ebr ebs ebu ec- eca ecb ecc ece ecr ecs ecu eea eeb eec eee eer ees era erb erc ere err ers eru es- esa esb esc ese esr ess esu eu- eua eub euc eue eur eus ra- raa rab rac rae rar ras rau rba rbb rbc rbe rbr rbs rbu rca rcb rcc rce rcr rcs rcu re- rea reb rec ree rer res reu rra rrb rrc rrr rrs rru rsa rsb rsc rse rsr rss rsu rua rub ruc rue rur rus ruu saa sab sac sae sar sas sau sba sbb sbc sbe sbr sbs sbu sca scb scc sce scr scs scu se- sea seb sec see ser ses seu sr- sra srb src sre srr srs ss- ssa ssb ssc sse ssr sss ssu sua sub suc sue sur sus suu ua- uaa uab uac uae uar uas uau uba ubb ubc ube ubr ubs ubu uca ucb ucc uce ucr ucs ucu uea ueb uec uee uer ues ur- ura urb urc ure urr urs uru usa usb usc use usr uss usu uua uuc uue uur uus uuu

-ase a-be aaaa aaab aaac aaae aaar aaas aaba aabb aabc aaca aacb aacc aace aacr aacs aacu aaea aaec aaes aara aarc aare aars aaru aasa aasc aase aass aasu aaus abaa abab abac abae abar abas abau abb- abba abbb abbe abbr abbs abca abcb abcc abcr abcs abec abee aber abes abra abrc abrs abs- absa abse abss absu abua abue abus acaa acab acac acae acar acas acba acca accc acce accs accu ace- acea acec acer aces acr- acra acrc acre acrr acrs acsa acsc acse acss acu- acue acur acus aeac aeas aebs aecb aeer aer- aera aerc aers aesc aess arab arac arae arar aras arau arba arbe arbs arc- arca arce arcs area arec aree ares areu arr- arra arrc arre arrr arrs arru ars- arsa arsc arse arsu arua arub arue asaa asab asac asae asar asas asau asba asbu asc- asca ascb ascc asce ascr asea asec asee aser ases asra asrc asrs asru assa assc asse assr asss assu asub asue asur asus auaa aube auca auce auer aur- aura aure ausa ause ausu baaa baar baas baba babb babe babr babs babu bac- baca bacc bace bacs baer baes bar- bara barb barc bare barr bars baru basa basc base bass basu bau- baur bbas bbau bbbb bbbs bbeb bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bcec bcer bces bcra bcrs bcru bcsa bcsc bcss bcuc bear beas beau beba bebb bebe beca becs becu beeb beer bees bera berc bere berr bers beru bes- besa bese bess beur brab brac brae bras brau brca brcb brce brea breb brec bree brer bres brrr brrs brsb brsr bruc brue brus bsaa bsac bsas bscs bsea bseb bsec bsee bser bses bsra bssc bsse buar buba bubb bube bubs bubu buca bucc buce bucs bucu buea buer bueu bur- bura burb bure burr burs buru busa busc buse buss busu buus caaa caab caac caas caba cabe cabs cabu cac- caca cacc cace cacr caec caer caes caeu cara carb carc care carr cars casa casb casc case casr cass casu cauc caus cbac cbar cbbc cbbs cbca cbcc cbce cbcr cbcs cbcu cbea cbec cbee cber cbre cbsa cbsc cbse cbus ccaa ccab ccac ccar ccas ccba ccbc ccca cccb cccc cccs cccu ccee ccra ccrc ccre ccrs ccsa ccss ccuc ccus ceac cear ceas ceba cebs cebu cec- ceca cece cecs ceeb ceec cees cer- cera cerc cere cers cesa cesc cese cesr cess crab crac crar cras crau crbc crbu crca crcc crce crcr cre- crea creb crec cree cres creu crsa crss crub crue crus csaa csab csac csar csas cscb cscc csce cscr cscs csea csec csee cser csra csrc csrs cssa csse cssr csua csur csus cuau cub- cuba cubb cube cubs cuca cucc cuce cuer cues cura curb cure curr curs cusa cusb cuss cusu eaba eaca eacc eaec eara earb eare ears easa ease eaus ebac ebba ebbc ebbr ebbs ebcc eber ebes ebru ebsa ebur ebus ecaa ecac ecar ecbc ecbe ecca eccb eccc ecce eces ecra ecrc ecrr ecru ecsa ecsc ecse ecss ecsu ecua ecus eeca eecs eeea eeee eees eera eerc eers eese eras erau erba erbb erbe erca ercc erce ereb erec erer eres erra errc erre errs ersa erse erua erub eruc erur erus esab esac esar esas esau esba esbs esca escb esce escr escs escu esea esee eser eses esra essa esse essu esus euba eubc euer eur- eura eurc eure eusa euse raab raas raba rabb rabe rabs rabu rac- raca racc race racs racu raec raer raes rara rarb rare rars rasa rasc rase rass rasu raua raub rauc raue raus rbbb rbbr rbbs rbss rcac rcas rcbc rccb rccc rccs rcsa rcsc rcss rea- reac reae rear reas reau reba