a-a a-b a-c aaa aab aac aak aan aar aas aau ab- aba abb abc abk abn abr abs abu ac- aca acb acc ack acn acr acs acu aka akb akc akk akn akr aks aku an- ana anb anc ank ann anr ans anu ar- ara arb arc ark arn arr ars aru as- asa asb asc ask asn asr ass asu au- aua aub auc auk aun aur aus b-u baa bab bac bak ban bar bas bau bba bbb bbc bbk bbn bbr bbs bbu bca bcb bcc bck bcn bcr bcs bcu bka bkb bkc bkk bkn bkr bks bna bnb bnc bnk bnn bnr bns bnu bra brb brk brn brr brs bru bsa bsb bsc bsk bsn bsr bss bsu bua bub buc buk bun bur bus buu c-- caa cab cac cak can car cas cau cba cbb cbc cbk cbn cbr cbs cbu cca ccb ccc cck ccn ccr ccs ccu cka ckb ckc cks cn- cna cnb cnc cnn cnr cns cnu cra crb crc crk crn crr crs cru csa csb csc csk csn csr css csu cua cub cuc cuk cun cur cus cuu ka- kaa kab kac kak kan kar kas kau kba kbb kbc kbk kbn kbr kbs kbu kca kcb kcc kck kcn kcr kcs kcu kkb kkc kkk kkn kkr kks kku kn- kna knc knk knn knr knu kra krc krk krn krr krs kru ksa ksb ksc ksk ksn ksr kss ksu kub kuc kuk kun kur kus kuu naa nab nac nak nan nar nas nau nba nbb nbc nbk nbn nbr nbs nbu nca ncb ncc nck ncn ncr ncs ncu nka nkc nkk nkn nkr nks nku nna nnb nnc nnk nnn nns nnu nra nrb nrc nrk nrn nrr nrs nru nsa nsb nsc nsk nsn nsr nss nsu nua nub nuc nuk nun nur nus nuu ra- raa rab rac rak ran rar ras rau rba rbb rbc rbk rbn rbr rbs rbu rca rcb rcc rcn rcr rcs rcu rkb rkc rkk rks rku rna rnb rnc rnn rnr rns rnu rra rrb rrc rrk rrn rrr rrs rru rsa rsb rsc rsk rsn rsr rss rsu rua rub ruc ruk run rur rus ruu saa sab sac sak san sar sas sau sba sbb sbc sbk sbn sbr sbs sbu sca scb scc sck scn scr scs scu sk- ska skb skc skk skr sks sku sna snb snc snk snn snr sns snu sr- sra srb src srk srn srr srs ss- ssa ssb ssc ssk ssn ssr sss ssu sua sub suc suk sun sur sus suu ua- uaa uab uac uak uan uar uas uau uba ubb ubc ubk ubn ubr ubs ubu uca ucb ucc uck ucn ucr ucs ucu uka ukb ukc ukk ukn ukr uku un- una unb unc unk unn unr uns unu ur- ura urb urc urk urn urr urs uru usa usb usc usk usn usr uss usu uua uuc uun uur uus uuu

-ana a-ak a-un aaaa aaab aaac aaan aaar aaas aaba aabb aabc aaca aacb aacc aack aacn aacr aacs aacu aaka aaku aana aara aarc aars aaru aasa aasc aass aasu aaus abaa abab abac abak aban abar abas abau abb- abba abbb abbr abbs abca abcb abcc abcn abcr abcs abnu abra abrc abrs abs- absa abss absu abua abuk abun abus acaa acab acac acan acar acas acba acca accc accs accu acks acr- acra acrc acrr acrs acsa acsc acss acu- acur acus akaa akan akar akas akca akka akku akna akr- akra aksa aksu akua ana- anaa anab anac anak anan anar anas anau anba anbb anbu anca ancc ank- anka anku anna annb anns anrc ansa ansu anua anub anun anus arab arac arak aran arar aras arau arba arbs arc- arca arcs arka arks arna arnk arns arr- arra arrc arrk arrr arrs arru ars- arsa arsc arsk arsu arua arub arun asaa asab asac asak asan asar asas asau asba asbu asc- asca ascb ascc ascr aska askr asks asnc asra asrc asrs asru assa assc assk assn assr asss assu asub asun asur asus auaa auca auks auna aunk aur- aura ausa ausu baaa baak baan baar baas baba babb babr babs babu bac- baca bacc back bacn bacs bak- baka bakr baks baku bana banc bank bann banr bans banu bar- bara barb barc bark barn barr bars baru basa basc bask bass basu bau- bauk baur bbas bbau bbbb bbbs bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bcnu bcra bcrs bcru bcsa bcsc bcsn bcss bcuc bnas bnrr bnss brab brac brak bran bras brau brca brcb brka brkb brna brns brrr brrs brsb brsr bruc brun brus bsaa bsac bsas bscs bsns bsra bssc buar buba bubb bubs bubu buca bucc buck bucs bucu buka bukk buku buna bunb bunk bunn buns bunu bur- bura burb burk burn burr burs buru busa busc busk buss busu buus caaa caab caac caan caas caba cabs cabu cac- caca cacc cack cacr caka cana canc cank cann cans cara carb carc cark carn carr cars casa casb casc cask casr cass casu cauc cauk caus cbac cbar cbbc cbbs cbca cbcc cbcn cbcr cbcs cbcu cbka cbkn cbkr cbna cbrn cbsa cbsc cbsn cbus ccaa ccab ccac ccar ccas ccba ccbc ccbn ccca cccb cccc cccs cccu ccna ccnb ccnc ccnr ccns ccnu ccra ccrc ccrs ccsa ccsn ccss ccuc ccus ckac ckan ckbc ckck ckcs cknb cknc ckns ckrc cksa cksb cnaa cnac cnas cnbc cnna cnrc cnrr cnsa cnss crab crac cran crar cras crau crbc crbu crca crcc crcr crkc crna crns crsa crss crub cruk crun crus csaa csab csac csak csar csas cscb cscc cscr cscs cska csks csra csrc csrs cssa cssr csua csur csus cuan cuau cub- cuba cubb cubs cuca cucc cuck cucn cuk- cuka cuna cura curb curn curr curs cusa cusb