aaaa aaab aaac aaar aaas aaba aabb aabc aabt aaca aacb aacc aacr aacs aact aacu aara aarc aars aart aaru aasa aasc aass aast aasu aata aatc aatt aaus abaa abab abac abar abas abat abau abb- abba abbb abbr abbs abbt abca abcb abcc abcr abcs abct abra abrc abrs abs- absa abss absu abta abts abtu abua abus abut ac-t acaa acab acac acar acas acat acba acca accc accs acct accu acr- acra acrc acrr acrs acsa acsc acss acst acta actc acts actt actu acu- acur acus acut arab arac arar aras arat arau arba arbs arc- arca arcs arct arr- arra arrc arrr arrs arrt arru ars- arsa arsc arst arsu arta artc artr arts arua arub arut asaa asab asac asar asas asat asau asba asbu asc- asca ascb ascc ascr asct asra asrc asrs asru assa assc assr asss asst assu asta astb astc astr asts asub asur asus at-t ataa atab atac atar atas atat atbs atca atcc atcr atcs atra atrc atru atsb atsc atst atta attr atts attu atua atub atuc atur atus auaa auca auct aur- aura ausa aust ausu aut- auts baaa baar baas baat baba babb babr babs babu bac- baca bacc bacs bact bar- bara barb barc barr bars bart baru basa basc bass bast basu bata batc bats batt batu bau- baur bbas bbau bbbb bbbs bbrc bcaa bcar bcas bcat bcbc bcbs bcca bccc bccs bcra bcrs bcru bcsa bcsc bcss bctc bcts bcuc brab brac bras brat brau brca brcb brrr brrs brsb brsr brst brtc bruc brus brut bsaa bsac bsas bsat bscs bsra bssc bsts btaa btcc btcs btrc btrt btss bttb btus buar buat buba bubb bubs bubu buca bucc bucs bucu bur- bura burb burr burs burt buru busa busc buss bust busu but- buta buts butt buus caaa caab caac caas caat caba cabs cabu cac- caca cacc cacr cara carb carc carr cars cart casa casb casc casr cass cast casu cat- cata catb catc cats catt catu cauc caus caut cbac cbar cbat cbbc cbbs cbca cbcc cbcr cbcs cbct cbcu cbrt cbsa cbsc cbta cbtc cbus ccaa ccab ccac ccar ccas ccat ccba ccbc ccca cccb cccc cccs cccu ccra ccrc ccrs ccrt ccsa ccss ccst cctb cctc cctt ccuc ccus ccut crab crac crar cras crat crau crbc crbu crca crcc crcr crrt crsa crss crst crtc crts crub crus crut csaa csab csac csar csas csat cscb cscc cscr cscs csra csrc csrs cssa cssr csta cstc cstr csts csua csur csus ctab ctba ctbs ctca ctrc ctrs ctsa ctsc ctss ctsu ctta ctts cuau cub- cuba cubb cubs cuca cucc cura curb curr curs curt cusa cusb cuss cust cusu cut- cuta cutc cuts cutt raab raas raat raba rabb rabs rabu rac- raca racc racs ract racu rara rarb rars rasa rasc rass rast rasu rata rats ratt ratu raua raub rauc raus raut rbbb rbbr rbbs rbss rbst rcac rcas rcbc rccb rccc rccs rcsa rcsc rcss rctc rcts rras rrat rrrr rsaa rscc rscs rssa rsts rstu rsua rtas rtca rtcc rtss rtts ruas ruba rubb rubs rubu ruca ruct rura rurc rurs ruru rusa russ rust rusu ruta ruts rutt rutu sa-c saab saac saar saas saat saba sabb sabc sabr sabs sabu saca sacc sacr sacs sact sacu sara sarc sarr sars sart saru sasa sasc sass sast sata satb satc satr sats satt satu saua sauc saur saus saut sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbct sbsa sbst sbtc sbus scaa scab scac scar scas scat scba sccc sccs scct scr- scra scrc scrs scsa scsc scsr scst scsu sctc sctr scts scua scub scur scut sras srbc srcc srct srta srtr srub ssaa ssab ssac ssas ssat ssau ssbr ssca sscc sscs ssra ssrc ssrs sssa sssb sssc ssss ssta sstb sstc ssts stab stac star stas stat stau stbc stbs stca stcc stcs stcu stra strc strs stru stss sttc sttr stub stuc stur stus stut suar suas suat sub- suba subb subs suc- succ sucr sucs sur- sura surc surr surs surt suru sus- susa suss sust susu suta sutu suus taa- taar taas taat taba tabb tabc tabs tabu taca tacc tacs tact tara tarb tarc tarr tars tart taru tasa tasb tasc tasr tass tast tasu tata tatb tatr tats tatt tatu taua taub tauc taur taus taut tbar tbas tbbs tbca tbcb tbcc tbrb tbst tbta tcbs tcca tccc tccu tctc tcts traa trab trac tras trat trau trca trcc trra trst trtc trtr trub truc trus trut truu tsaa tsar tsat tsau tsbc tsca tscc tssa tssr tsst tstc tsts ttab ttbb ttss tttt tuar tuas tuat tuba tubb tubr tubs tubu tuca tucc tura turb turc turr turs turt turu tusa tusc tuss tust tuta tuts tutt tutu uabc uaca uarc uars uart uaru uasa uata uatu uaua ubac ubar ubba ubra ucar ucas ucat ucbc ucca ucrc ucsa ucsb ucsc ucst ucsu ucua ucut urac uras urat urau urba urbs urca urra ursa urss ursu urts urur urus urut us-a usaa usac usar usas usat usba usbc usbr usbs usca uscc uscs usra ussa ussb ussc ussr usss usst ussu usta ustb ustc usts usua usus utac utas utau utsa utsc uttu uuta uuuu