a-a a-b a-c aaa aab aac aak aam aar aau ab- aba abb abc abk abm abr abu ac- aca acb acc ack acm acr acu aka akb akc akk akm akr aku ama amb amc amk amm amr amu ar- ara arb arc ark arm arr aru au- aua aub auc auk aum aur b-u baa bab bac bak bam bar bau bba bbb bbc bbk bbm bbr bbu bca bcb bcc bck bcm bcr bcu bka bkb bkc bkk bkm bkr bma bmb bmc bmk bmm bmr bmu bra brb brk brm brr bru bua bub buc buk bum bur buu c-- caa cab cac cak cam car cau cba cbb cbc cbk cbm cbr cbu cca ccb ccc cck ccm ccr ccu cka ckb ckc ckm cma cmb cmc cmk cmm cmr cmu cra crb crc crk crm crr cru cua cub cuc cuk cum cur cuu ka- kaa kab kac kak kam kar kau kba kbb kbc kbk kbm kbr kbu kca kcb kcc kck kcm kcr kcu kkb kkc kkk kkm kkr kku kma kmb kmc kmk kmm kmu kra krc krk krr kru kub kuc kuk kum kur kuu m-r maa mab mac mak mam mar mau mba mbb mbc mbk mbm mbr mbu mc- mca mcb mcc mck mcm mcr mcu mka mkb mkc mkk mkm mkr mku mma mmb mmc mmk mmm mmr mmu mra mrb mrc mrk mrm mrr mru mua mub muc muk mum mur muu ra- raa rab rac rak ram rar rau rba rbb rbc rbk rbm rbr rbu rca rcb rcc rcm rcr rcu rkb rkc rkk rkm rku rma rmb rmc rmm rmr rra rrb rrc rrk rrm rrr rru rua rub ruc ruk rum rur ruu ua- uaa uab uac uak uam uar uau uba ubb ubc ubk ubr ubu uca ucb ucc uck ucm ucr ucu uka ukb ukc ukk ukr uku um- uma umb umc umm umr umu ur- ura urb urc urk urm urr uru uua uuc uum uur uuu

a-ak aaaa aaab aaac aaam aaar aaba aabb aabc aabm aaca aacb aacc aack aacm aacr aacu aaka aaku aama aamb aamc aamr aara aarc aarm aaru abaa abab abac abak abam abar abau abb- abba abbb abbr abca abcb abcc abcr abma abmb abmc abra abrc abua abuk abum acaa acab acac acar acba acca accc accm accu acma acmc acmu acr- acra acrc acrm acrr acu- acum acur akaa akam akar akca akka akku akr- akra akua amaa amac amam amar amb- amba ambr ambu amca amcc amka amm- amma ammu amra amrc amua amum amur arab arac arak aram arar arau arba arc- arca arcm arka arma armc armm armu arr- arra arrc arrk arrr arru arua arub arum auaa auca auma aur- aura baaa baak baam baar baba babb babm babr babu bac- baca bacc back bak- baka bakr baku bama bamb bamc bamm bamu bar- bara barb barc bark barm barr baru bau- bauk baum baur bbau bbbb bbcm bbrc bcaa bcam bcar bcbc bcca bccc bccm bcma bcra bcru bcuc bmaa brab brac brak bram brau brca brcb brka brkb brmc brrm brrr bruc brum buar buba bubb bubu buca bucc buck bucu buka bukk buku bum- buma bumb bur- bura burb burk burm burr buru caaa caab caac caam caba cabu cac- caca cacc cack cacm cacr caka cama camb camc camk camm cara carb carc cark carm carr cauc cauk caum cbac cbar cbbc cbca cbcc cbcm cbcr cbcu cbka cbkm cbkr cbrm ccaa ccab ccac ccam ccar ccba ccbc ccca cccb cccc cccm cccu cckm ccma ccmb ccmc ccmm ccra ccrc ccuc ckac ckbc ckck ckcm ckrc ckrm cmaa cmac cmba cmbc cmcc cmmb cmmc cmra cmrr crab crac cram crar crau crbc crbu crca crcc crcr crkc crmb crub cruk crum cuau cub- cuba cubb cuca cucc cuck cucm cuk- cuka cum- cuma cura curb curr kaaa kaab kaak kaam kaar kaba kabb kabc kabr kabu kacb kacc kacu kaka kakc kakk kakm kaku kam- kama kamb kamc kamm kamr kamu kara karb kark karm karr karu kau- kaub kauc kauk kaum kaur kbaa kbab kbac kbak kbam kbar kbba kbbb kbbc kbbk kbbm kbbr kbbu kbca kbcb kbck kbcr kbcu kbkb kbkk kbkr kbmb kbmc kbmr kbra kbrb kbrc kbrk kbru kbua kbub kbuc kbuk kbur kbuu kcaa kcab kcac kcam kcar kcau kcba kcbc kcbk kcbr kcbu kcca kccb kccc kcck kccr kccu kckc kckk kckm kckr kcmb kcmc kcmk kcmm kcmr kcrc kcrr kcru kcua kcub kcuk kkaa kkac kkam kkar kkba kkbb kkbr kkcb kkck kkcm kkcr kkkk kkma kkmc kkmk kkmr kkrb kkrc kkrk kkrr kkua kkuu kmac kmak kmam kmbc kmbr kmca kmcb kmcc kmcm kmcr kmcu kmkk kmmk kmmm kmmr kmrb kmrc kmrr kmuc kmur krab krac krak kram krar krba krbb krbk krbm krbr krca krcb krcc krcm krcu krka krkc krkk krkr krku krma krmb krmc krmr krrb krrc krrk krrm krrr krua kruc kruk krum krur kuac kuam kuar kuau kuba kubb kubc kubr kubu kuca kucb kucc kucr kuka kukk kuku kuma kumm kumr kumu kura kurb kurk kurm kurr kuru kuub kuuk kuur kuuu maaa maac maak maam maar maba mabu mac- maca macb macc mack macr macu maka maku mama mamc mamu mar- mara marc mark marm marr maru maua mauk maum maur mbac mbam mbba mbca mcaa mcac mcba mcbc mcca mccc mckk mcmc mcrc mkak mmaa mmab mmac mmar mmcc mmcm mmmc mmmm mmrc mr-c mrac mrbb mrbm mrca mrcb mrcc mrkr mrmc mrrc mruk muac muak muar muc- mucc muck mucu muka muma mumm mumu mura murc murk murr muru raab raak raam raba rabb rabk rabu rac- raca racc rack racu raka rakk raku rama ramb ramm ramu rara rarb rark raua raub rauc rauk raum rbbb rbbr rbmk rcac rcbc rccb rccc rrkm rrmc rrrr rrum ruba rubb rubu ruca ruck ruka rukk ruku ruma rumb rumm rura rurc ruru uabc uaca uamc uarc