a-a a-b aaa aab aag aak aar aas aau ab- aba abb abg abk abr abs abu ag- aga agb agg agk agr ags agu aka akb akg akk akr aks aku ar- ara arb arg ark arr ars aru as- asa asb asg ask asr ass asu au- aua aub aug auk aur aus b-u baa bab bag bak bar bas bau bba bbb bbg bbk bbr bbs bbu bga bgb bgg bgk bgr bgs bgu bka bkb bkg bkk bkr bks bra brb brg brk brr brs bru bsa bsb bsg bsk bsr bss bsu bua bub bug buk bur bus buu gaa gab gag gak gar gas gau gba gbg gbk gbr gbs gbu gga ggb ggg ggr ggs ggu gka gkb gks gra grb grg grk grr grs gru gsa gsb gsg gsk gsr gss gsu gu- gua gub gug guk gur gus guu ka- kaa kab kag kak kar kas kau kba kbb kbk kbr kbs kbu kga kgb kgs kgu kkb kkk kkr kks kku kra krg krk krr krs kru ksa ksb ksg ksk ksr kss ksu kub kug kuk kur kus kuu ra- raa rab rag rak rar ras rau rba rbb rbg rbk rbr rbs rbu rga rgb rgg rgk rgr rgs rkb rkg rkk rks rku rra rrb rrg rrk rrr rrs rru rsa rsb rsg rsk rsr rss rsu rua rub rug ruk rur rus ruu saa sab sag sak sar sas sau sba sbb sbg sbk sbr sbs sbu sga sgb sgg sgk sgr sgs sgu sk- ska skb skg skk skr sks sku sr- sra srb srg srk srr srs ss- ssa ssb ssg ssk ssr sss ssu sua sub sug suk sur sus suu ua- uaa uab uag uak uar uas uau uba ubb ubg ubk ubr ubs ubu uga ugb ugg ugk ugr ugs ugu uka ukb ukk ukr uku ur- ura urb urg urk urr urs uru usa usb usg usk usr uss usu uua uug uur uus uuu

a-ak aaaa aaab aaar aaas aaba aabb aaka aaku aara aars aaru aasa aass aasu aaus abaa abab abag abak abar abas abau abb- abba abbb abbr abbs abra abrs abs- absa abss absu abua abug abuk abus agag agar agas agau agba agga aggu agra agsa agsg agsu agua agur agus akaa akar akas akka akku akr- akra aksa aksu akua arab arag arak arar aras arau arba arbs arga argb args arka arks arr- arra arrg arrk arrr arrs arru ars- arsa arsk arsu arua arub arug asaa asab asag asak asar asas asau asba asbu aska askr asks asra asrg asrs asru assa assk assr asss assu asub asur asus auaa auga augs auks aur- aura ausa ausu auug baaa baak baar baas baba babb babr babs babu baga bagg bags bak- baka bakr baks baku bar- bara barb barg bark barr bars baru basa bask bass basu bau- baug bauk baur bbas bbau bbbb bbbs bbga bbrg bggs brab brag brak bras brau brka brkb brrr brrs brsb brsr brug brus bsaa bsas bsgs bsra buar buba bubb bubs bubu buga bugg bugs buka bukk buku bur- bura burb burg burk burr burs buru busa busk buss busu buus gaar gaas gaba gabb gabr gabs gabu gaga gagg gags gagu gaku gara garb garg garr gars gasa gasb gask gasr gass gaua gaub gauk gaur gaus gbag gbas gbbs gggg ggss grab gras grau grbr grrr grrs grss grua grub grug grur grus gsab gskb gsur guaa guag guar guba gubb gubs gubu guga gugb gugg gugu gura gurb gurg gurk gurr gurs guru gusa gusb guss guus kaaa kaab kaag kaak kaar kaas kaba kabb kabg kabr kabu kag- kaga kagb kagg kagr kags kagu kaka kakk kaks kaku kara karb karg kark karr kars karu kas- kasa kasb kask kasr kass kasu kau- kaub kaug kauk kaur kaus kbaa kbab kbak kbar kbas kbba kbbb kbbg kbbk kbbr kbbs kbbu kbga kbgb kbgg kbgr kbkb kbkg kbkk kbkr kbra kbrb kbrg kbrk kbru kbsa kbsb kbsg kbsk kbsr kbss kbsu kbua kbub kbuk kbur kbus kbuu kgab kgak kgas kgba kgbb kgbr kgga kggg kggr kgks kgra kgrb kgrg kgrk kgrr kgrs kgsr kgua kgus kkaa kkag kkar kkba kkbb kkbg kkbr kkbs kkgb kkgr kkkk kkrb kkrk kkrr kkrs kksa kksr kkss kksu kkua kkus kkuu krab krag krak krar kras krba krbb krbg krbk krbr krgs krka krkk krkr krks krku krrb krrg krrk krrr krrs krsa krsk krsr krss krsu krua krug kruk krur ksab ksak ksar ksas ksau ksba ksbr ksbs ksgg ksgr ksgu kska kskb kskg kskk kskr ksks ksku ksra ksrb ksrg ksrr ksrs kssa kssr ksss kssu ksua ksub ksug ksuu kuar kuau kuba kubb kubr kubs kubu kuga kugb kugr kugs kuka kukk kuks kuku kura kurb kurk kurr kurs kuru kusa kusb kusg kusu kuub kuuk kuur kuuu raab raag raak raas raba rabb rabk rabs rabu raga ragg rags ragu raka rakk raku rara rarb rark rars rasa rask rass rasu raua raub rauk raus rbbb rbbr rbbs rbss rgba rkss rras rrrr rsaa rsgb rssa rsua ruag ruas ruba rubb rubs rubu ruga rugg rugs ruka rukk ruku rura rurs ruru rusa rusk russ rusu saab saag saak saar saas saba sabb sabr sabs sabu saga sagg sags sagu saka sakb sakk saks saku sara sarg sark sarr sars saru sasa sask sass saua sauk saur saus sbaa sbar sbas sbbs sbrk sbsa sbus sgaa sgau sggg sggs sgss skab skag skar skra skss skua skur sras srgb srub ssaa ssab ssas ssau ssbr ssgs ssra ssrg ssrs sssa sssb ssss suar suas sub- suba subb subg subs sug- suga sugg suka suks suku sur- sura surg surr surs suru sus- susa susk suss susu suus uars uaru uasa uaua ubar ubba ubra ugab ugar uggs ugra ugur uguu ukba ukra uksa uksg ukur uras urau urba urbs urga urgu urka urra ursa urss ursu uruk urur urus