kbtb kbtc kbtf kbtk kbtr kbts kbtt kcaa kcab kcac kcad kcar kcas kcat kcba kcbc kcbd kcbf kcbk kcbr kcbs kcca kccb kccc kccd kcck kccr kcct kcda kcdc kcdd kcdr kcds kcfa kcfb kcfc kcfd kcft kckc kckf kckk kckr kcrc kcrr kcrs kcrt kcsa kcsb kcsc kcsd kcsf kcsr kcss kcst kcta kctb kctc kdaa kdab kdac kdad kdaf kdak kdar kdat kdbb kdbr kdbs kdca kdcc kdcd kdcr kddb kddc kddd kddf kddk kddr kdfc kdfr kdft kdka kdkb kdkd kdkk kdkr kdkt kdrb kdrf kdrs kdsc kdsd kdsk kdsr kdss kdst kdta kdtd kdtr kfab kfac kfar kfat kfbc kfbk kfbt kfcd kfcf kfcr kfcs kfda kffa kffb kfff kffk kfka kfkb kfra kfrc kfrd kfrr kfrs kfsa kfsd kfsk kfsr kfst kfta kftc kftk kftt kkaa kkac kkar kkat kkba kkbb kkbd kkbr kkbs kkbt kkcb kkcd kkck kkcr kkcs kkct kkda kkdc kkdd kkdt kkfr kkfs kkft kkkk kkrb kkrc kkrf kkrk kkrr kkrs kkrt kksa kksd kksf kksr kkss kkst kktc kktk kkts krab krac krad krak krar kras krat krba krbb krbd krbk krbr krbt krca krcb krcc krcd krcs krda krdc krdd krdr krds krfc krfd krff krfs krft krka krkc krkd krkk krkr krks krrb krrc krrf krrk krrr krrs krrt krsa krsc krsd krsf krsk krsr krss krst krta krtc krtk krtr krts ksab ksac ksaf ksak ksar ksas ksat ksba ksbc ksbr ksbs ksca kscb ksck kscr kscs ksdc ksdk ksdr ksds ksfa ksfb ksfc ksfr ksft kska kskb kskd kskf kskk kskr ksks ksra ksrb ksrf ksrr ksrs ksrt kssa kssr ksss ksst ksta kstb kstc kstk kstr ksts kstt ktaa ktak ktar ktas ktat ktba ktbb ktbc ktbr ktbt ktcc ktck ktcr ktcs ktdb ktdc ktdd ktdf ktdk ktdr ktfb ktfc ktfs ktkb ktkc ktkk ktkr ktks ktkt ktrb ktrc ktrf ktrk ktrr ktrs ktrt ktsa ktsc ktsd ktsf ktsr ktst kttc kttf kttk kttr ktts kttt raab raad raaf raak raas raat raba rabb rabk rabs rac- raca racc rack racs ract rada radc radd radr rads radt rafa rafc raff raft raka rakk rakt rara rarb rarf rark rars rasa rasc rasd rask rass rast rata ratf ratk rats ratt rbaf rbbb rbbr rbbs rbds rbsd rbss rbst rcac rcaf rcas rcbc rccb rccc rccs rcdc rcds rcfc rcrd rcsa rcsc rcsd rcss rctc rcts rdac rdas rdfa rfds rffc rftc rkkf rkss rkts rrad rras rrat rrfc rrrr rsaa rsaf rscc rscs rsdd rsds rsfc rssa rsts rtas rtbf rtca rtcc rtdt rtfb rtfc rtss rtts sa-c saab saac saad saaf saak saar saas saat saba sabb sabc sabr sabs saca sacc sacd sack sacr sacs sact sada sadb sadc sadd sadr sads sadt safa safb safc saff safr saft saka sakb sakk saks sara sarc sard sarf sark sarr sars sart sasa sasc sasd sasf sask sass sast sata satb satc satd satr sats satt sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbct sbds sbfc sbrk sbsa sbsd sbst sbtc sbtk scaa scab scac scad scaf scak scar scas scat scba sccc sccs scct scda scdc scdf scds scfa scfc sck- scr- scra scrc scrs scsa scsc scsd scsr scst sctc sctd sctr scts sdak sdba sdcc sddc sdds sdfc sdrc sdrs sdsc sdsf sdss sfar sfas sfba sfbc sfca sfcc sfcs sfdc sfdk sffc sfra sfrc sfss sfts skab skac skad skaf skar skat skfc skra skrt sksd skss sraf sras srbc srcc srct srfc srsd srta srtr ssaa ssab ssac ssas ssat ssbr ssca sscc sscs ssdc ssdd ssdf ssfc ssra ssrc ssrs sssa sssb sssc sssf ssss ssta sstb sstc sstd ssts stab stac stad stak star stas stat stbc stbd stbs stca stcc stcs stds stfc stks stra strc strd strk strs stsf stss sttc sttd sttr taa- taaf taar taas taat taba tabb tabc tabs taca tacc tack tacs tact tada tads tafa tafc taff taft taka takk taks takt tara tarb tarc tard tarf tark tarr tars tart tasa tasb tasc task tasr tass tast tata tatb tatr tats tatt tbaf tbar tbas tbbs tbca tbcb tbcc tbcd tbrb tbst tbta tcad tcbs tcca tccc tcdd tcfc tctc tcts tdac tddb tdff tdkr tdra tdss tfca tfdc tfrs tfsd tfss tftc tkac tkts traa trab trac trad traf trak tras trat trca trcc trfc trfd trfr trra trsd trst trtc trtr tsaa tsar tsat tsbc tsbd tsca tscc tsdb tsfc tsks tssa tssf tssr tsst tstc tsts ttab ttbb ttfa ttfc ttff ttss tttt