aaaa aaab aaac aaal aaar aaas aaba aabb aabc aabl aabt aaca aacb aacc aacl aacr aacs aact aala aalc aall aals aara aarc aars aart aasa aasc aass aast aata aatc aatt abaa abab abac abal abar abas abat abb- abba abbb abbr abbs abbt abca abcb abcc abcl abcr abcs abct abla abls abra abrc abrs abs- absa absl abss abta abts ac-t acaa acab acac acar acas acat acba acbl acca accc accs acct acla aclc aclr acls acr- acra acrc acrr acrs acsa acsc acsl acss acst acta actc actl acts actt alaa alac alal alar alas alat alb- alba albc albs alca alcc alcs all- alla alll allr alls alsa alsc alst alta alts arab arac aral arar aras arat arba arbs arc- arca arcs arct arla arr- arra arrc arrr arrs arrt ars- arsa arsc arst arta artc artr arts asaa asab asac asal asar asas asat asba asc- asca ascb ascc ascl ascr asct asla aslr asra asrc asrs assa assc assl assr asss asst asta astb astc astl astr asts at-l at-t ataa atab atac atal atar atas atat atbs atca atcc atcl atcr atcs atla atls atra atrc atsb atsc atst atta attr atts baaa baal baar baas baat baba babb babr babs bac- baca bacc bacs bact bala balc ball bals balt bar- bara barb barc barr bars bart basa basc bass bast bata batc bats batt bbas bbbb bbbs bblb bbls bbrc bcaa bcar bcas bcat bcbc bcbs bcca bccc bccl bccs bcra bcrs bcsa bcsc bcsl bcss bctc bcts blaa blab blac blas blat blbt blls blrc blss blst blts brab brac bras brat brca brcb brls brrr brrs brsb brsr brst brtc bsaa bsac bsas bsat bscs bslc bsra bssc bsts btaa btcc btcl btcs btla btrc btrt btss bttb caaa caab caac caal caas caat caba cabs cac- caca cacc cacr cala calc call cals calt cara carb carc carl carr cars cart casa casb casc casl casr cass cast cat- cata catb catc cats catt cbac cbal cbar cbat cbbc cbbs cbca cbcc cbcl cbcr cbcs cbct cblb cblc cbrl cbrt cbsa cbsc cbta cbtc cbtl ccaa ccab ccac ccar ccas ccat ccba ccbc ccca cccb cccc cccl cccs ccla cclc ccls ccra ccrc ccrl ccrs ccrt ccsa ccsl ccss ccst cctb cctc cctl cctt clab clar clas clat clra clrs clsa clsc cltb cltc clts crab crac crar cras crat crbc crca crcc crcr crls crrt crsa crss crst crtc crtl crts csaa csab csac csar csas csat cscb cscc cscl cscr cscs csla cslr csra csrc csrs cssa cssr csta cstc cstr csts ctab ctal ctba ctbs ctca ctls ctrc ctrl ctrs ctsa ctsc ctss ctta ctts laaa laac laal laar laas laat laba labr labs laca lacc lacl lacs lact lala lall lara larb larc larr lars lart lasa lass last lata latc lats latt lbar lbcc lblr lbrs lbrt lbsc lcac lcat lcbc lcca lccc lccs lcls lcra lcrl lcrs lcsc lcsr lctl lcts llat llbs llcc llcs lllc llll lrac lral lrat lrba lrcs lrrc lrrr lrst lrta lrts ls-r lsat lscb lscs lsla lsrc lssa lssr lsts ltac ltbl ltcc ltcs ltra ltrs ltsa ltsr lttc lttr raab raas raat raba rabb rabl rabs rac- raca racc racs ract rala ralb rall ralt rara rarb rars rasa rasc rasl rass rast rata rats ratt rbbb rbbr rbbs rbcl rbsl rbss rbst rcac rcas rcbc rccb rccc rccs rcls rcsa rcsc rcsl rcss rctc rcts rlab rlcs rlls rras rrat rrrr rsaa rscc rscs rslc rssa rssl rsts rtas rtca rtcc rtls rtlt rtss rtts sa-c saab saac saal saar saas saat saba sabb sabc sabr sabs saca sacc sacr sacs sact sala salc sall sals salt sara sarc sarl sarr sars sart sasa sasc sasl sass sast sata satb satc satl satr sats satt sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbct sbsa sbst sbtc scaa scab scac scal scar scas scat scba sccc sccl sccs scct scl- sclc scls scr- scra scrc scrs scsa scsc scsl scsr scst sctc sctl sctr scts slaa slab slac slas slat slcc slrc slrs slsa slsc slst slts sras srbc srcc srct srta srtr ssaa ssab ssac ssas ssat ssbr ssca sscc sscs ssla sslc sslt ssra ssrc ssrl ssrs sssa sssb sssc ssss ssta sstb sstc sstl ssts stab stac stal star stas stat stbc stbs stca stcc stcs stlc stlt stra strc strs stss sttc sttr taa- taal taar taas taat taba tabb tabc tabl tabs taca tacc tacl tacs tact tala talc tall tals tara tarb tarc tarr tars tart tasa tasb tasc tasr tass tast tata tatb tatr tats tatt tbar tbas tbbs tbca tbcb tbcc tbrb tbst tbta tcbs tcca tccc tctc tcts tlac tlrs traa trab trac tral tras trat trca trcc trcl trra trst trtc trtr tsaa tsal tsar tsat tsbc tsca tscc tssa tssr tsst tstc tsts ttab ttbb ttss tttt