a-a a-b a-c aaa aab aac aaj aar aas aau ab- aba abb abc abj abr abs abu ac- aca acb acc acj acr acs acu aja ajb ajc ajj ajr ajs aju ar- ara arb arc arj arr ars aru as- asa asb asc asj asr ass asu au- aua aub auc auj aur aus b-u baa bab bac baj bar bas bau bba bbb bbc bbr bbs bbu bca bcb bcc bcj bcr bcs bcu bja bjc bjj bjr bjs bju bra brb brj brr brs bru bsa bsb bsc bsj bsr bss bsu bua bub buc buj bur bus buu c-- c-j caa cab cac caj car cas cau cba cbb cbc cbj cbr cbs cbu cca ccb ccc ccj ccr ccs ccu cja cjb cjc cjr cjs cra crb crc crj crr crs cru csa csb csc csj csr css csu cua cub cuc cur cus cuu jaa jab jac jaj jar jas jau jba jbc jbj jbr jbs jbu jca jcb jcc jcr jcs jcu jja jjb jjc jjj jjr jjs jju jra jrb jrc jrr jrs jsa jsb jsc jsj jsr jss jsu jub jur jus ra- raa rab rac raj rar ras rau rba rbb rbc rbr rbs rbu rca rcb rcc rcj rcr rcs rcu rja rjc rjr rra rrb rrc rrr rrs rru rsa rsb rsc rsj rsr rss rsu rua rub ruc rur rus ruu saa sab sac saj sar sas sau sba sbb sbc sbj sbr sbs sbu sca scb scc scj scr scs scu sja sjb sjc sjj sjr sjs sju sr- sra srb src srj srr srs ss- ssa ssb ssc ssj ssr sss ssu sua sub suc sur sus suu ua- uaa uab uac uaj uar uas uau uba ubb ubc ubr ubs ubu uca ucb ucc ucj ucr ucs ucu ujc ujs ur- ura urb urc urr urs uru usa usb usc usj usr uss usu uua uuc uur uus uuu

aaaa aaab aaac aaar aaas aaba aabb aabc aaca aacb aacc aacr aacs aacu aara aarc aars aaru aasa aasc aass aasu aaus abaa abab abac abaj abar abas abau abb- abba abbb abbr abbs abca abcb abcc abcr abcs abjs abra abrc abrs abs- absa abss absu abua abus acaa acab acac acar acas acba acca accc accs accu acr- acra acrc acrr acrs acsa acsc acss acu- acur acus ajab ajac ajar ajas ajba ajss ajur arab arac arar aras arau arba arbs arc- arca arcs arja arju arr- arra arrc arrr arrs arru ars- arsa arsc arsu arua arub asaa asab asac asar asas asau asba asbu asc- asca ascb ascc ascj ascr asja asra asrc asrs asru assa assc assr asss assu asub asur asus auaa auca auja aujs aur- aura ausa ausu baaa baar baas baba babb babr babs babu bac- baca bacc bacs baja bajs baju bar- bara barb barc barr bars baru basa basc bass basu bau- baur bbas bbau bbbb bbbs bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bcra bcrs bcru bcsa bcsc bcss bcuc bjcc brab brac braj bras brau brca brcb brrr brrs brsb brsr bruc brus bsaa bsac bsas bscs bsra bssc buar buba bubb bubs bubu buca bucc bucs bucu buja buju bur- bura burb burj burr burs buru busa busc buss busu buus caaa caab caac caas caba cabs cabu cac- caca cacc cacr caja caju cara carb carc carj carr cars casa casb casc casr cass casu cauc caus cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbcu cbrj cbsa cbsc cbus ccaa ccab ccac ccar ccas ccba ccbc ccca cccb cccc cccs cccu ccra ccrc ccrs ccsa ccss ccuc ccus cjar cjbc cjca cjcb cjcj cjcs cjrb cjrc cjrj cjrs cjru cjsb cjss crab crac craj crar cras crau crbc crbu crca crcc crcr crsa crss crub crus csaa csab csac csar csas cscb cscc cscr cscs csra csrc csrs cssa cssr csua csur csus cuau cub- cuba cubb cubs cuca cucc cuju cura curb curr curs cusa cusb cuss cusu jaar jaas jaba jabr jabs jaca jacc jacs jacu jaja jaju jara jarc jarr jars jaru jasa jasc jass jaur jaus jbaa jbar jcbc jccc jcrc jcss jjar jjcc jrbr jssr jsss juab juar juba jubu juca jucu juja juju jura jurr jurs juss raab raaj raas raba rabb rabs rabu rac- raca racc racs racu raja rajs raju rara rarb rars rasa rasc rass rasu raua raub rauc raus rbbb rbbr rbbs rbss rcac rcas rcbc rccb rccc rccs rcsa rcsc rcss rras rrrr rsaa rsaj rscc rscs rssa rsua ruas ruba rubb rubs rubu ruca ruja rura rurc rurs ruru rusa russ rusu sa-c saab saac saaj saar saas saba sabb sabc sabr sabs sabu saca sacc sacr sacs sacu saja sara sarc sarr sars saru sasa sasc sass saua sauc saur saus sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbsa sbus scaa scab scac scar scas scba sccc sccs scr- scra scrc scrs scsa scsc scsr scsu scua scub scur sjab sjac sjcc sjcs sjsu sjur sras srbc srcc srub ssaa ssab ssac ssas ssau ssbr ssca sscc sscs ssra ssrc ssrs sssa sssb sssc ssss suar suas sub- suba subb subj subs suc- succ sucr sucs sur- sura surc surr surs suru sus- susa suss susu suus uabc uaca uarc uars uaru uasa uaua ubac ubar ubba ubja ubra ucar ucas ucbc ucca ucrc ucsa ucsb ucsc ucsj ucsu ucua urac uras urau urba urbs urca urra ursa urss ursu urur urus us-a usaa usac usar usas usba usbc usbr usbs usca uscc uscs usjc usra ussa ussb ussc ussr usss ussu usua usus uuuu

-aaa- aaaas aaarc aaasa aaass aabaa aabba aabra aacbc aacjc aacsa aacsb aacss aacus aarau aasra abaab ababa ababs ababu abaca abacs abaja abara abaru abasa abass abbac abbaj abbar abbas abbrs abbur abcas abccc abjar abrac abrar abras abrus absar abuja abura aburr acaca acacb acar- acara acars acass acaua accas accra accub accur accus