a-ak aaaa aaab aaac aaap aaar aaas aaba aabb aabc aabp aabt aaca aacb aacc aack aacp aacr aacs aact aaka aapa aapc aaps aapt aara aarc aarp aars aart aasa aasc aass aast aata aatc aatk aatt abaa abab abac abak abap abar abas abat abb- abba abbb abbr abbs abbt abca abcb abcc abcp abcr abcs abct abpa abpc abpp abpr abps abra abrc abrs abs- absa absp abss abta abts ac-t acaa acab acac acap acar acas acat acba acca accc accp accs acct acks acpa acpr acps acpt acr- acra acrc acrr acrs acsa acsc acss acst acta actc acts actt akaa akap akar akas akca akka akr- akra aksa akst apac apak apap apar apas apat apba apbr apbs apca apcb apcc apcr apcs appa appc appr apps appt apra aprc aprs aprt apsa apss apta aptc apts aptt arab arac arak arap arar aras arat arba arbs arc- arca arcs arct arka arks arpa arps arr- arra arrc arrk arrr arrs arrt ars- arsa arsc arsk arst arta artc artr arts asaa asab asac asak asap asar asas asat asba asc- asca ascb ascc ascp ascr asct aska askr asks askt aspa aspc aspr asps aspt asra asrc asrs assa assc assk assp assr asss asst asta astb astc astp astr asts at-t ataa atab atac atak atap atar atas atat atbs atca atcc atck atcr atcs atka atkt atpr atra atrc atrk atrp atsb atsc atst atta attp attr atts baaa baak baar baas baat baba babb babr babs bac- baca bacc back bacs bact bak- baka bakr baks bakt bapa bapc bapp baps bapt bar- bara barb barc bark barr bars bart basa basc bask bass bast bata batc bats batt bbas bbbb bbbs bbpr bbrc bcaa bcap bcar bcas bcat bcbc bcbp bcbs bcca bccc bccs bcpp bcps bcra bcrs bcsa bcsc bcss bctc bcts bkpr bkpt bksp bpcp bprc bpsa brab brac brak bras brat brca brcb brka brkb brrr brrs brsb brsr brst brtc bsaa bsac bsap bsas bsat bscp bscs bskt bspp bspr bsra bssc bsts btaa btbp btcc btcs btps btrc btrt btss bttb caaa caab caac caap caas caat caba cabs cac- caca cacc cack cacr caka capa capb capc capp caps capt cara carb carc cark carp carr cars cart casa casb casc cask casp casr cass cast cat- cata catb catc cats catt cbac cbar cbat cbbc cbbs cbca cbcc cbcp cbcr cbcs cbct cbka cbkr cbpc cbpp cbrt cbsa cbsc cbta cbtc ccaa ccab ccac ccap ccar ccas ccat ccba ccbc ccca cccb cccc cccp cccs ccpa ccpp ccpr ccps ccra ccrc ccrp ccrs ccrt ccsa ccsp ccss ccst cctb cctc cctt ckac ckat ckbc ckck ckcs ckpc ckpr ckrc cksa cksb ckst cktb ckts cpaa cpac cpap cpas cpbc cpca cpcs cppa cpps cprs cprt cpsa cpsc cpsk cpsr cptp cptr cpts crab crac crap crar cras crat crbc crca crcc crcr crkc crkp crpc crps crrt crsa crsp crss crst crtc crtp crts csaa csab csac csak csar csas csat cscb cscc cscr cscs cska csks cspa cspb cspc csps cspt csra csrc csrs cssa cssr csta cstc cstr csts ctab ctba ctbs ctca ctcp ctpp ctps ctrc ctrp ctrs ctsa ctsc ctss ctta ctts kaaa kaab kaak kaap kaar kaas kaat kaba kabb kabc kabr kacb kacc kacp kacs kact kaka kakc kakk kaks kakt kap- kapa kapc kapp kaps kapt kara karb kark karp karr kars kart kas- kasa kasb kasc kask kasp kasr kass kast kat- kata katb katc katk katp katr kats katt kbaa kbab kbac kbak kbap kbar kbas kbat kbba kbbb kbbc kbbk kbbr kbbs kbbt kbca kbcb kbck kbcr kbcs kbct kbkb kbkk kbkr kbpa kbpc kbpk kbpr kbps kbpt kbra kbrb kbrc kbrk kbrt kbsa kbsb kbsk kbsr kbss kbst kbta kbtb kbtc kbtk kbtr kbts kbtt kcaa kcab kcac kcap kcar kcas kcat kcba kcbc kcbk kcbr kcbs kcca kccb kccc kcck kccr kcct kckc kckk kckr kcpa kcpc kcpr kcps kcpt kcrc kcrp kcrr kcrs kcrt kcsa kcsb kcsc kcsp kcsr kcss kcst kcta kctb kctc kkaa kkac kkap kkar kkat kkba kkbb kkbr kkbs kkbt kkcb kkck kkcr kkcs kkct kkkk kkpc kkpk kkps kkpt kkrb kkrc kkrk kkrr kkrs kkrt kksa kksp kksr kkss kkst kktc kktk kkts kpac kpak kpar kpas kpat kpba kpbb kpbr kpbs kpcc kpcr kpcs kpkk kpkr kppc kppk kppp kppr kprb kprc kprk kprp kprr kprs kprt kpsc kpsp kptr kpts kptt krab krac krak krap krar kras krat krba krbb krbk krbr krbt krca krcb krcc krcs krka krkc krkk krkr krks krpa krpr krps krpt krrb krrc krrk krrr krrs krrt krsa krsc krsk krsr krss krst krta krtc krtk krtr krts ksab ksac ksak ksar ksas ksat ksba ksbc ksbp ksbr ksbs ksca kscb ksck kscr kscs kska kskb kskk kskr ksks kspa kspb kspc kspk kspr ksps kspt ksra ksrb ksrp ksrr ksrs ksrt kssa kssr ksss ksst ksta kstb kstc kstk kstp kstr ksts kstt ktaa ktak ktap ktar ktas ktat ktba ktbb ktbc ktbr ktbt ktcc ktck ktcr ktcs ktkb ktkc ktkk ktkr ktks ktkt ktpa ktpk ktpr ktpt ktrb ktrc ktrk ktrp ktrr ktrs ktrt ktsa ktsc ktsr ktst kttc kttk kttp kttr ktts kttt paak paap paar paas paat paba pabt paca pack pacs pact paka paks papa papb papp papr paps par- para parc park parp parr pars part pasa pasc pask pasp pass past pata patr pats patt pbac pbar pbcc pbpa pbpk pbrs pbsa pbsp pcaa pcap pcas pcba pcbc pcbs pcca pccc pccs pcks pcpb pcpp pcps pcra pcrc pcsa pcts pkcs pkts ppac ppap ppar ppcc ppcs pppa pppp ppps pprc ppss ppta ppts pptt prar pras prat prbc prbs prca prcc prcp prcs prps prrs prsa prsc prss prtc prtp prtr psac psap psas psat psbr psbt psca pspp pspr psps psrk psrp pssa pssc psst psts ptab ptak ptas ptca ptcc ptsa pttc pttk raab raak raas raat