a-a a-b a-c aaa aab aac aam aar aas aau ab- aba abb abc abm abr abs abu ac- aca acb acc acm acr acs acu ama amb amc amm amr ams amu ar- ara arb arc arm arr ars aru as- asa asb asc asm asr ass asu au- aua aub auc aum aur aus b-u baa bab bac bam bar bas bau bba bbb bbc bbm bbr bbs bbu bca bcb bcc bcm bcr bcs bcu bma bmb bmc bmm bmr bms bmu bra brb brm brr brs bru bsa bsb bsc bsm bsr bss bsu bua bub buc bum bur bus buu c-- caa cab cac cam car cas cau cba cbb cbc cbm cbr cbs cbu cca ccb ccc ccm ccr ccs ccu cma cmb cmc cmm cmr cms cmu cra crb crc crm crr crs cru csa csb csc csm csr css csu cua cub cuc cum cur cus cuu m-r maa mab mac mam mar mas mau mba mbb mbc mbm mbr mbs mbu mc- mca mcb mcc mcm mcr mcs mcu mma mmb mmc mmm mmr mms mmu mra mrb mrc mrm mrr mrs mru msa msb msc msm msr mss msu mua mub muc mum mur mus muu ra- raa rab rac ram rar ras rau rba rbb rbc rbm rbr rbs rbu rca rcb rcc rcm rcr rcs rcu rma rmb rmc rmm rmr rms rra rrb rrc rrm rrr rrs rru rsa rsb rsc rsm rsr rss rsu rua rub ruc rum rur rus ruu saa sab sac sam sar sas sau sba sbb sbc sbm sbr sbs sbu sca scb scc scm scr scs scu sma smb smc smm smr sms smu sr- sra srb src srm srr srs ss- ssa ssb ssc ssm ssr sss ssu sua sub suc sum sur sus suu ua- uaa uab uac uam uar uas uau uba ubb ubc ubr ubs ubu uca ucb ucc ucm ucr ucs ucu um- uma umb umc umm umr ums umu ur- ura urb urc urm urr urs uru usa usb usc usm usr uss usu uua uuc uum uur uus uuu

aaaa aaab aaac aaam aaar aaas aaba aabb aabc aabm aaca aacb aacc aacm aacr aacs aacu aama aamb aamc aamr aams aara aarc aarm aars aaru aasa aasc aasm aass aasu aaus abaa abab abac abam abar abas abau abb- abba abbb abbr abbs abca abcb abcc abcr abcs abma abmb abmc abms abra abrc abrs abs- absa abss absu abua abum abus acaa acab acac acar acas acba acca accc accm accs accu acma acmc acms acmu acr- acra acrc acrm acrr acrs acsa acsc acsm acss acu- acum acur acus amaa amac amam amar amas amb- amba ambr ambs ambu amca amcc amcs amm- amma ammu amra amrc amsa amsc amss amua amum amur arab arac aram arar aras arau arba arbs arc- arca arcm arcs arma armc armm arms armu arr- arra arrc arrr arrs arru ars- arsa arsc arsu arua arub arum asaa asab asac asam asar asas asau asba asbm asbu asc- asca ascb ascc ascr asma asmm asmr asms asra asrc asrm asrs asru assa assc assr asss assu asub asum asur asus auaa auca auma aur- aura ausa ausm ausu baaa baam baar baas baba babb babm babr babs babu bac- baca bacc bacs bama bamb bamc bamm bams bamu bar- bara barb barc barm barr bars baru basa basc bass basu bau- baum baur bbas bbau bbbb bbbs bbcm bbrc bcaa bcam bcar bcas bcbc bcbs bcca bccc bccm bccs bcma bcms bcra bcrs bcru bcsa bcsc bcsm bcss bcuc bmaa bmus brab brac bram bras brau brca brcb brmc brrm brrr brrs brsb brsr bruc brum brus bsaa bsac bsam bsas bscs bsms bsra bsrm bssc bssm buar buba bubb bubs bubu buca bucc bucs bucu bum- buma bumb bums bur- bura burb burm burr burs buru busa busc buss busu buus caaa caab caac caam caas caba cabs cabu cac- caca cacc cacm cacr cama camb camc camm cams cara carb carc carm carr cars casa casb casc casm casr cass casu cauc caum caus cbac cbar cbbc cbbs cbca cbcc cbcm cbcr cbcs cbcu cbms cbrm cbsa cbsc cbsm cbus ccaa ccab ccac ccam ccar ccas ccba ccbc ccca cccb cccc cccm cccs cccu ccma ccmb ccmc ccmm ccms ccra ccrc ccrs ccsa ccss ccuc ccus cmaa cmac cmas cmba cmbc cmbs cmcc cmcs cmmb cmmc cmms cmra cmrr cmrs cmsa cmsc cmus crab crac cram crar cras crau crbc crbu crca crcc crcr crmb crms crsa crss crub crum crus csaa csab csac csar csas csbm cscb cscc cscr cscs csma csmc csmu csra csrc csrs cssa cssm cssr csua csum csur csus cuau cub- cuba cubb cubs cuca cucc cucm cum- cuma cums cura curb curr curs cusa cusb cuss cusu maaa maac maam maar maas maba mabs mabu mac- maca macb macc macr macs macu mama mamc mams mamu mar- mara marc marm marr mars maru masa masc masr mass masu maua maum maur maus mbac mbam mbas mbba mbbs mbca mbcs mbms mbrs mbus mcaa mcac mcas mcba mcbc mcca mccc mcmc mcrc mcsa mcss mmaa mmab mmac mmar mmas mmcc mmcm mmcs mmmc mmmm mmms mmrc mmsc mmsu mmus mr-c mrac mras mrbb mrbm mrbs mrca mrcb mrcc mrcs mrmc mrrc mrsa mrsc msaa msar msas msau msba msca mscc msma msmb msmc msmm msms msmu msra msrb mssa mssm mssr msus muac muar mubs muc- mucc mucu muma mumm mums mumu mura murc murr murs muru musa musc muss musu raab raam raas raba rabb rabs rabu rac- raca racc racs racu rama ramb ramm rams ramu rara rarb rars rasa rasc rasm rass rasu raua raub rauc raum raus rbbb rbbr rbbs rbms rbss rcac rcas rcbc rccb rccc rccs rcms rcsa rcsc rcss rmas rmbs rmsc rras rrmc rrrr rrum rsaa rscc rscs rsma rssa rsua rsum ruas ruba rubb rubs rubu ruca ruma rumb