a-a a-b aaa aab aak aan aao aar aau ab- aba abb abk abn abo abr abu aka akb akk akn ako akr aku an- ana anb ank ann ano anr anu aoa aob aok aon aoo aor aou ar- ara arb ark arn aro arr aru au- aua aub auk aun auo aur b-u baa bab bak ban bao bar bau bba bbb bbk bbn bbo bbr bbu bka bkb bkk bkn bko bkr bna bnb bnk bnn bno bnr bnu boa bob bok bon boo bor bou bra brb brk brn bro brr bru bua bub buk bun buo bur buu ka- kaa kab kak kan kao kar kau kba kbb kbk kbn kbo kbr kbu kkb kkk kkn kkr kku kn- kna knk knn kno knr knu koa kob kok kon koo kor kou kra krk krn kro krr kru kub kuk kun kur kuu naa nab nak nan nao nar nau nba nbb nbk nbn nbo nbr nbu nka nkk nkn nko nkr nku nna nnb nnk nnn nno nnu no- noa nob nok non noo nor nou nra nrb nrk nrn nro nrr nru nua nub nuk nun nuo nur nuu oaa oab oak oan oao oar oau ob- oba obb obk obn obo obr obu oka okb okk oko okr oku on- ona onb onk onn ono onr onu oo- ooa oob ook oon ooo oor or- ora orb ork orn oro orr oru ou- oua ouk oun ouo our ra- raa rab rak ran rao rar rau rba rbb rbk rbn rbo rbr rbu rkb rkk rko rku rna rnb rnn rno rnr rnu roa rob rok ron roo ror rou rra rrb rrk rrn rrr rru rua rub ruk run ruo rur ruu ua- uaa uab uak uan uao uar uau uba ubb ubk ubn ubo ubr ubu uka ukb ukk ukn ukr uku un- una unb unk unn uno unr unu uoa uob uok uon uoo uor ur- ura urb urk urn uro urr uru uua uun uur uuu

-ana a-ak a-ok a-un aaaa aaab aaan aaar aaba aabb aaka aaku aana aaon aaoo aara aaro aaru abaa abab abak aban abar abau abb- abba abbb abbo abbr abnu aboa abob abok abon aboo abor abou abra abro abua abuk abun akaa akan akao akar akka akko akku akna akok akon akr- akra akua ana- anaa anab anak anan anao anar anau anba anbb anbo anbu ank- anka anko anku anna annb anno ano- anoa anon anor anua anub anun aoba aonb aono aora aorb aorn aoun arab arak aran arar arau arba arka arko arna arnk arno aroa arob aron aroo aror arr- arra arrk arro arrr arru arua arub arun auaa auna aunk aur- aura auro baaa baak baan baar baba babb babo babr babu bak- baka bako bakr baku bana bank bann bano banr banu baon bar- bara barb bark barn baro barr baru bau- bauk baur bbau bbbb bnor bnrr boab boak boan boar boba bobb bobo bobu boka bokn boko boku bona bonk bonn bono bonu boob book boon boor bor- bora bork born boro borr boru boua bouk boun bour brab brak bran brao brau brka brkb brna brno broa brob brok bron broo bror brou brrr brun buar buba bubb bubo bubu buka bukk buko buku buna bunb bunk bunn buno bunu buon bur- bura burb burk burn buro burr buru kaaa kaab kaak kaan kaar kaba kabb kabo kabr kabu kaka kakk kakn kako kaku kana kanb kann kano kanu kaoa kaok kaon kaor kara karb kark karn karo karr karu kau- kaub kauk kaun kauo kaur kbaa kbab kbak kbar kbba kbbb kbbk kbbo kbbr kbbu kbkb kbkk kbko kbkr kbna kbnn kbno kbnr kbnu kboa kbob kbok kbon kboo kbra kbrb kbrk kbrn kbro kbru kbua kbub kbuk kbun kbur kbuu kkaa kkan kkar kkba kkbb kkbn kkbo kkbr kkkk kknb kknn kkno kknu kkoa kkob kkon kkoo kkor kkrb kkrk kkrn kkro kkrr kkua kkuu knaa knab knan knar knau knba knbb knbn knbr knbu knkk knnb knnk knnr knob knok knon knor knou knrb knrk knro knub knuk knur koab koak koan koar koba kobb kobk kobn kobo kobr kobu koka kokb kokk kokn koko kokr koku kona konk kono koob kook koon kooo koor koou kora korb kork korn koro korr koru koua koub kour kouu krab krak kran krar krba krbb krbk krbr krka krkk krkn krko krkr krku krna krnb krnk krnn krno krnu kroa krob krok kroo kror krrb krrk krrn krro krrr krua kruk krun krur kuan kuar kuau kuba kubb kubo kubr kubu kuka kukk kukn kuku kuna kunk kuno kunr kunu kuoa kuok kuon kuoo kura kurb kurk kuro kurr kuru kuub kuuk kuur kuuu naaa naab naan naar naba nabk nabo nabu naka nako nan- nana nanb nann nano nanu naor nara nark narn naro narr naru nauo naur nbaa nbak nbar nbbo nkau nkok nkor nnnn noaa noak noba nobo nobu noko non- nona nonn nono nonu noo- noob nook noon nooo noor nor- nora norb nork norn noro norr noun nour nrab nrna nron nuan nuba nubk nuka nuku nuna nunk nunn nuno nuon nura nurn nurr nuru nuuk oaau oara obak oban obba obbo obkb obok obon obor obra obro okak okan okka okko okna okno okok okon okor okra okro okun okur onab onan onar onna onno onon onor onra onur ooaa ooak ooba ooku oona oooo oora orab orak oran orao orar orba orbb orbo orbu orka orko orna orno oro- orok oron oror orra orro orub ouan oun- ouna our- oura ourn ouro ouu- raab raak raan raba rabb rabk rabo rabu raka rakk raku rana rank rann rano raob raok rara rarb rark raro raua raub rauk raun rbbb rbbr rnbr roab roak roan roar rob- roba robb robo robu roka rokk roko rokr roku rona ronk rono roob rook roon roor rora rork roro roru roua roub rouk roun rrna rrrr rrun ruan