a-ak a-ok aaaa aaab aaac aaas aaba aabb aabc aabt aaca aacb aacc aack aaco aacs aact aaka aaoo aasa aasc aass aast aata aatc aatk aatt abaa abab abac abak abas abat abb- abba abbb abbo abbs abbt abca abcb abcc abcs abct aboa abob abok aboo abos abot abs- absa abss abta abts ac-t acaa acab acac acas acat acba acca accc acco accs acct acks acoa acos acot acsa acsc acss acst acta actc acto acts actt akaa akao akas akca akka akko akok akos akot aksa akst aoba aoca aocs aoks aoss aotc asaa asab asac asak asao asas asat asba asbo asc- asca ascb ascc asco asct aska asko asks askt asob asoc asok asos asot assa assc assk asso asss asst asta astb astc asto asts at-t ataa atab atac atak atas atat atbs atca atcc atck atco atcs atka atkt atob atoc atok atos atot atsb atsc atst atta atto atts baaa baak baas baat baba babb babo babs bac- baca bacc back baco bacs bact bak- baka bako baks bakt baos basa basc bask baso bass bast bata batc bato bats batt bbas bbbb bbbs bcaa bcas bcat bcbc bcbs bcca bccc bccs bcos bcsa bcsc bcss bctc bcts boab boac boak boas boat boba bobb bobo bobs boca bock boco bocs boka boko boks boob booc book boos boot bosa bosc bosk boso boss bost bota botb boto bots bott bsaa bsac bsas bsat bscs bskt bsos bssc bsts btaa btcc btcs btob btss bttb c-bo caaa caab caac caas caat caba cabo cabs cac- caca cacc cack caco caka caos casa casb casc cask caso cass cast cat- cata catb catc cato cats catt cbac cbat cbbc cbbs cbca cbcc cbcs cbct cbka cbko cbot cbsa cbsc cbta cbtc ccaa ccab ccac ccas ccat ccba ccbc ccca cccb cccc cccs ccob ccoc ccsa ccss ccst cctb cctc cctt ckac ckat ckbc ckck ckco ckcs ckoa ckob ckoc ckoo ckos ckot cksa cksb ckso ckst cktb ckts coak coas coat coba cobb cobo cobs coca cock coco coct cok- coka coko coob cook coos coot cosa cosc coso coss cost cota cotb cotc coto cots cott csaa csab csac csak csao csas csat cscb cscc csco cscs cska csks csob csos csot cssa csta cstc csto csts ctab ctba ctbs ctca ctos ctot ctsa ctsc ctss ctta ctts k-os kaaa kaab kaak kaas kaat kaba kabb kabc kabo kacb kacc kaco kacs kact kaka kakc kakk kako kaks kakt kaoa kaoc kaok kaos kas- kasa kasb kasc kask kaso kass kast kat- kata katb katc katk kato kats katt kbaa kbab kbac kbak kbas kbat kbba kbbb kbbc kbbk kbbo kbbs kbbt kbca kbcb kbck kbco kbcs kbct kbkb kbkk kbko kboa kbob kboc kbok kboo kbos kbot kbsa kbsb kbsk kbso kbss kbst kbta kbtb kbtc kbtk kbto kbts kbtt kcaa kcab kcac kcas kcat kcba kcbc kcbk kcbs kcca kccb kccc kcck kcct kckc kckk kcko kcob kcos kcot kcsa kcsb kcsc kcss kcst kcta kctb kctc kcto kkaa kkac kkat kkba kkbb kkbo kkbs kkbt kkcb kkck kkco kkcs kkct kkkk kkoa kkob kkoo kkot kksa kkss kkst kktc kktk kkts koab koac koak koas koba kobb kobc kobk kobo kobs koca kocb kock kocs koct koka kokb kokc kokk koko koks koob kooc kook kooo koos koot kos- kosa kosb kosc koso koss kost kota kotb kotc kotk koto kots kott ksab ksac ksak ksas ksat ksba ksbc ksbs ksca kscb ksck ksco kscs kska kskb kskk ksko ksks ksob ksoc ksok ksoo ksos kssa ksso ksss ksst ksta kstb kstc kstk ksto ksts kstt ktaa ktak ktao ktas ktat ktba ktbb ktbc ktbt ktcc ktck ktco ktcs ktkb ktkc ktkk ktko ktks ktkt ktob ktoc ktok ktoo ktot ktsa ktsc ktso ktst kttc kttk ktto ktts kttt oaks oasc oass oast oats obak obas obba obbo obkb obok obos obot obss obst obts ocab ocac ocak ocas ocat ocbc occa occc occt ocks ocos ocsa oct- octa octo octs okak okas okka okko okok okot oksa okso okta okto ooaa ooak ooba oooo ooos oosa oost ootb oots osak osas osat osba osca oscc osco osoo osos ossa ossb osso osta ostc osts otac otak otas otbs oto- otok otoo otos otsa otso otta otto otts s-os sa-c saab saac saak saas saat saba sabb sabc sabo sabs saca sacc sack saco sacs sact saka sakb sakk sako saks saos sasa sasc sask saso sass sast sata satb satc sato sats satt sbaa sbac sbas sbbs sbca sbcc sbcs sbct sbot sbsa sbst sbtc sbtk scaa scab scac scak scas scat scba sccc sccs scct sck- scob scok scoo scot scsa scsc scso scst sctc scto scts skab skac skat skot skss soak soas soat soba sobo sobs sobt soca sock soco socs soka sokk soko sook soos soot sosa soso soss sost sota sotc sotk soto sots ssaa ssab ssac ssao ssas ssat ssca sscc sscs ssoc ssot sssa sssb sssc ssss ssta sstb sstc ssts stab stac stak stas stat stbc stbs stca stcc stcs stks stoa stob stok stoo stos stot stss sttc taa- taas taat taba tabb tabc tabo tabs taca tacc tack taco tacs tact taka takk tako taks takt taoa taos tasa tasb tasc task tass tast tata tatb tato tats tatt tbas tbbs tbca tbcb tbcc tbst tbta tcbs tcca tccc tcos tctc tcts tkac tkos tkts toab toas toat toba tobo tobs tobt toca tock toco toka toko tooa took toos toot tosa tosb tosc tosk toso toss tost tota totc toto tots tott tsaa tsao tsat tsbc tsca tscc tsks tsob tsos tssa tsst tstc tsts ttab ttbb ttss tttt