a-ak a-ok aaaa aaab aaas aaba aabb aabt aaka aaoo aasa aass aast aata aatk aatt abaa abab abak abas abat abb- abba abbb abbo abbs abbt aboa abob abok aboo abos abot abs- absa abss abta abts akaa akao akas akka akko akok akos akot aksa akst aoba aoks aoss asaa asab asak asao asas asat asba asbo aska asko asks askt asob asok asos asot assa assk asso asss asst asta astb asto asts at-t ataa atab atak atas atat atbs atka atkt atob atok atos atot atsb atst atta atto atts baaa baak baas baat baba babb babo babs bak- baka bako baks bakt baos basa bask baso bass bast bata bato bats batt bbas bbbb bbbs boab boak boas boat boba bobb bobo bobs boka boko boks boob book boos boot bosa bosk boso boss bost bota botb boto bots bott bsaa bsas bsat bskt bsos bsts btaa btob btss bttb k-os kaaa kaab kaak kaas kaat kaba kabb kabo kaka kakk kako kaks kakt kaoa kaok kaos kas- kasa kasb kask kaso kass kast kat- kata katb katk kato kats katt kbaa kbab kbak kbas kbat kbba kbbb kbbk kbbo kbbs kbbt kbkb kbkk kbko kboa kbob kbok kboo kbos kbot kbsa kbsb kbsk kbso kbss kbst kbta kbtb kbtk kbto kbts kbtt kkaa kkat kkba kkbb kkbo kkbs kkbt kkkk kkoa kkob kkoo kkot kksa kkss kkst kktk kkts koab koak koas koba kobb kobk kobo kobs koka kokb kokk koko koks koob kook kooo koos koot kos- kosa kosb koso koss kost kota kotb kotk koto kots kott ksab ksak ksas ksat ksba ksbs kska kskb kskk ksko ksks ksob ksok ksoo ksos kssa ksso ksss ksst ksta kstb kstk ksto ksts kstt ktaa ktak ktao ktas ktat ktba ktbb ktbt ktkb ktkk ktko ktks ktkt ktob ktok ktoo ktot ktsa ktso ktst kttk ktto ktts kttt oaks oass oast oats obak obas obba obbo obkb obok obos obot obss obst obts okak okas okka okko okok okot oksa okso okta okto ooaa ooak ooba oooo ooos oosa oost ootb oots osak osas osat osba osoo osos ossa ossb osso osta osts otak otas otbs oto- otok otoo otos otsa otso otta otto otts s-os saab saak saas saat saba sabb sabo sabs saka sakb sakk sako saks saos sasa sask saso sass sast sata satb sato sats satt sbaa sbas sbbs sbot sbsa sbst sbtk skab skat skot skss soak soas soat soba sobo sobs sobt soka sokk soko sook soos soot sosa soso soss sost sota sotk soto sots ssaa ssab ssao ssas ssat ssot sssa sssb ssss ssta sstb ssts stab stak stas stat stbs stks stoa stob stok stoo stos stot stss taa- taas taat taba tabb tabo tabs taka takk tako taks takt taoa taos tasa tasb task tass tast tata tatb tato tats tatt tbas tbbs tbst tbta tkos tkts toab toas toat toba tobo tobs tobt toka toko tooa took toos toot tosa tosb tosk toso toss tost tota toto tots tott tsaa tsao tsat tsks tsob tsos tssa tsst tsts ttab ttbb ttss tttt