a-a a-b aaa aab aak aan aao aar aas ab- aba abb abk abn abo abr abs aka akb akk akn ako akr aks an- ana anb ank ann ano anr ans aoa aob aok aon aoo aor aos ar- ara arb ark arn aro arr ars as- asa asb ask asn aso asr ass baa bab bak ban bao bar bas bba bbb bbk bbn bbo bbr bbs bka bkb bkk bkn bko bkr bks bna bnb bnk bnn bno bnr bns boa bob bok bon boo bor bos bra brb brk brn bro brr brs bsa bsb bsk bsn bso bsr bss ka- kaa kab kak kan kao kar kas kba kbb kbk kbn kbo kbr kbs kkb kkk kkn kkr kks kn- kna knk knn kno knr koa kob kok kon koo kor kos kra krk krn kro krr krs ksa ksb ksk ksn kso ksr kss naa nab nak nan nao nar nas nba nbb nbk nbn nbo nbr nbs nka nkk nkn nko nkr nks nna nnb nnk nnn nno nns no- noa nob nok non noo nor nos nra nrb nrk nrn nro nrr nrs nsa nsb nsk nsn nso nsr nss oaa oab oak oan oao oar oas ob- oba obb obk obn obo obr obs oka okb okk oko okr oks on- ona onb onk onn ono onr ons oo- ooa oob ook oon ooo oor oos or- ora orb ork orn oro orr ors os- osa osb osk osn oso osr oss ra- raa rab rak ran rao rar ras rba rbb rbk rbn rbo rbr rbs rkb rkk rko rks rna rnb rnn rno rnr rns roa rob rok ron roo ror ros rra rrb rrk rrn rrr rrs rsa rsb rsk rsn rso rsr rss saa sab sak san sao sar sas sba sbb sbk sbn sbo sbr sbs sk- ska skb skk sko skr sks sna snb snk snn sno snr sns soa sob sok son soo sor sos sr- sra srb srk srn sro srr srs ss- ssa ssb ssk ssn sso ssr sss

-ana a-ak a-ok aaaa aaab aaan aaar aaas aaba aabb aaka aana aaon aaoo aara aaro aars aasa aass abaa abab abak aban abar abas abb- abba abbb abbo abbr abbs aboa abob abok abon aboo abor abos abra abro abrs abs- absa abss akaa akan akao akar akas akka akko akna akok akon akos akr- akra aksa ana- anaa anab anak anan anao anar anas anba anbb anbo ank- anka anko anna annb anno anns ano- anoa anon anor anos ansa anso aoba aoks aonb aono aora aorb aorn aors aoss arab arak aran arar aras arba arbs arka arko arks arna arnk arno arns aroa arob aron aroo aror aros arr- arra arrk arro arrr arrs ars- arsa arsk arso asaa asab asak asan asao asar asas asba asbo aska asko askr asks asno asob asok ason asor asos asra asro asrs assa assk assn asso assr asss baaa baak baan baar baas baba babb babo babr babs bak- baka bako bakr baks bana bank bann bano banr bans baon baos bar- bara barb bark barn baro barr bars basa bask baso bass bbas bbbb bbbs bnas bnor bnrr bnss boab boak boan boar boas boba bobb bobo bobs boka bokn boko boks bona bonk bonn bono bons boob book boon boor boos bor- bora bork born boro borr bors bosa bosk bosn boso boss brab brak bran brao bras brka brkb brna brno brns broa brob brok bron broo bror bros brrr brrs brsb brsr bsaa bsas bsns bson bsos bsra k-os kaaa kaab kaak kaan kaar kaas kaba kabb kabo kabr kaka kakk kakn kako kaks kana kanb kann kano kans kaoa kaok kaon kaor kaos kara karb kark karn karo karr kars kas- kasa kasb kask kasn kaso kasr kass kbaa kbab kbak kbar kbas kbba kbbb kbbk kbbo kbbr kbbs kbkb kbkk kbko kbkr kbna kbnn kbno kbnr kboa kbob kbok kbon kboo kbos kbra kbrb kbrk kbrn kbro kbsa kbsb kbsk kbsn kbso kbsr kbss kkaa kkan kkar kkba kkbb kkbn kkbo kkbr kkbs kkkk kknb kknn kkno kkns kkoa kkob kkon kkoo kkor kkrb kkrk kkrn kkro kkrr kkrs kksa kksn kksr kkss knaa knab knan knar knas knba knbb knbn knbr knkk knnb knnk knnr knns knob knok knon knor knrb knrk knro knrs knsa knsb knsk knsn knso knsr knss koab koak koan koar koas koba kobb kobk kobn kobo kobr kobs koka kokb kokk kokn koko kokr koks kona konk kono koob kook koon kooo koor koos kora korb kork korn koro korr kors kos- kosa kosb koso kosr koss krab krak kran krar kras krba krbb krbk krbr krka krkk krkn krko krkr krks krna krnb krnk krnn krno kroa krob krok kroo kror kros krrb krrk krrn krro krrr krrs krsa krsk krsn krsr krss ksab ksak ksan ksar ksas ksba ksbn ksbr ksbs kska kskb kskk kskn ksko kskr ksks ksna ksnb ksnk ksnn ksnr ksns ksob ksok kson ksoo ksor ksos ksra ksrb ksrn ksro ksrr ksrs kssa kssn ksso kssr ksss naaa naab naan naar naas naba nabk nabo nabs naka nako naks nan- nana nanb nann nano nans naor naos nara nark narn naro narr nars nas- nasa nasb nask naso nasr nass nbaa nbak nbar nbas nbbo nkok nkor nnnn nnos nnsa nnss noaa noak noba nobo nobs noko non- nona nonn nono nons noo- noob nook noon nooo noor noos nor- nora norb nork norn noro norr nors nos- nosa nosk noss nrab nras nrna nron nrsa nsaa nsar nsbo nskk nsna nsnr nsok nsos nsra nssa nssb nsso nssr nsss oaks oara oars oass obak oban obas obba obbo obkb obok obon obor obos obra obro obsn obsr obss okak okan okas okka okko okna okno okok okon okor okra okro oksa okso onab onan onar onas onna onno onon onor onos onra onso ooaa ooak ooba oona oons oooo ooos oora oosa