a-a a-b a-c a-z aaa aab aac aar aas aau aaz ab- aba abb abc abr abs abu abz ac- aca acb acc acr acs acu acz ar- ara arb arc arr ars aru arz as- asa asb asc asr ass asu asz au- aua aub auc aur aus auz az- aza azb azs azu azz b-u baa bab bac bar bas bau baz bba bbb bbc bbr bbs bbu bca bcb bcc bcr bcs bcu bcz bra brb brr brs bru brz bsa bsb bsc bsr bss bsu bua bub buc bur bus buu buz bza bzr bzs bzu bzz c-- caa cab cac car cas cau caz cba cbb cbc cbr cbs cbu cbz cca ccb ccc ccr ccs ccu ccz cra crb crc crr crs cru crz csa csb csc csr css csu csz cua cub cuc cur cus cuu cuz cz- czc ra- raa rab rac rar ras rau raz rba rbb rbc rbr rbs rbu rca rcb rcc rcr rcs rcu rra rrb rrc rrr rrs rru rsa rsb rsc rsr rss rsu rua rub ruc rur rus ruu ruz rza rzb saa sab sac sar sas sau saz sba sbb sbc sbr sbs sbu sca scb scc scr scs scu sr- sra srb src srr srs ss- ssa ssb ssc ssr sss ssu ssz sua sub suc sur sus suu suz sza szr szu ua- uaa uab uac uar uas uau uaz uba ubb ubc ubr ubs ubu uca ucb ucc ucr ucs ucu ur- ura urb urc urr urs uru urz usa usb usc usr uss usu usz uua uuc uur uus uuu uza uzb uzu zaa zab zac zar zas zaz zbb zbc zbr zbs zcs zrs zsa zsu zsz zub zuc zur zus zuz zzr zzs zzz

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 abar abas abau abb- abba abbb abbr abbs abca abcb abcc abcr abcs abra abrc abrs abs- absa abss absu abua abus abza abzu acaa acab acac acar acas acba acca accc accs accu acr- acra acrc acrr acrs acsa acsc acss acu- acur acus arab arac arar aras arau arba arbs arc- arca arcs arr- arra arrc arrr arrs arru ars- arsa arsc arsu arua arub arza arzu asaa asab asac asar asas asau asba asbu asc- asca ascb ascc ascr asra asrc asrs asru assa assc assr asss assu asub asur asus auaa auca aur- aura ausa ausu aza- azab azar azas azaz azca azra azua azur azza baaa baar baas baaz baba babb babr babs babu bac- baca bacc bacs bacz bar- bara barb barc barr bars baru barz basa basc bass basu bau- baur baza bbas bbau bbbb bbbs bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bcra bcrs bcru bcsa bcsc bcss bcuc brab brac bras brau braz brca brcb brrr brrs brsb brsr bruc brus bruz brza bsaa bsac bsas bscs bsra bssc buar buba bubb bubs bubu buca bucc bucs bucu bucz bur- bura burb burr burs buru burz busa busc buss busu buus buuz buza buzz bzzz caaa caab caac caas caba cabs cabu cac- caca cacc cacr cara carb carc carr cars casa casb casc casr cass casu cauc caus caza cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbcu cbsa cbsc cbus ccaa ccab ccac ccar ccas ccba ccbc ccca cccb cccc cccs cccu ccra ccrc ccrs ccsa ccss ccuc ccus crab crac crar cras crau crbc crbu crca crcc crcr crcz crsa crss crub crus cruz csaa csab csac csar csas cscb cscc cscr cscs csra csrc csrs cssa cssr csua csur csus cuau cub- cuba cubb cubs cuca cucc cura curb curr curs cusa cusb cuss cusu czar raab raas raaz raba rabb rabs rabu rac- raca racc racs racu rara rarb rars rarz rasa rasc rass rasu raua raub rauc raus raza razr razz rbbb rbbr rbbs rbss rcac rcas rcbc rccb rccc rccs rcsa rcsc rcss rras rrrr rsaa rscc rscs rssa rsua ruas ruba rubb rubs rubu ruca rura rurc rurs ruru rusa russ rusu ruza rzab sa-c saab saac saar saas saaz saba sabb sabc sabr sabs sabu sabz saca sacc sacr sacs sacu sara sarc sarr sars saru sarz sasa sasc sass saua sauc saur saus saza 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 sras srbc srcc srub srzu ssaa ssab ssac ssas ssau ssbr ssca sscc sscs ssra ssrc ssrs sssa sssb sssc ssss suar suas sub- suba subb subs subz suc- succ sucr sucs sur- sura surc surr surs suru sus- susa suss susu susz suus suza suzu suzz szar szss szuc szur uabc uaca uarc uars uaru uasa uaua ubac ubar ubba ubra ucar ucas ucbc ucca ucrc ucsa ucsb ucsc ucsu ucua urac uras urau urba urbs urca urra ursa urss ursu urur urus uruz urza us-a usaa usac usar usas usba usbc usbr usbs usca uscc uscs usra ussa ussb ussc ussr usss ussu usua usus usza uuuu uzsa zaar zaba zabr zabu zaca zacs zara zarb zarr zaru zasu zaur zaza zazu zbar zbus zcar zsss zubr zubu zura zurb zurr zuru zuzu zzzs zzzz

-aaa- aaaas aaarc aaasa aaass aabaa aabba aabra aacbc aacsa aacsb aacss aacus aarau aasra abaab ababa ababs ababu abaca abacs abara abaru abasa abass abaza abazu abbac abbar abbas abbrs abbur abcas abccc abrac abrar abras abrus absar abura aburr abuzz abzac abzar acaca acacb acar- acara acars acass acaua accas accra accub accur accus acrab acuba acura acusa ar-ab ara-c arab- araba arabs araca arara arars araru arass arasu arbab arbar arbas arbaz arbus arcas arcus arras arrau arrua arsac arsuz aruaa aruac aruba arura aruru arus- arusa arzac arzua asaba asabc asara asasa asbca asbru ascar ascus asrar assab assac assas assur asubs asura