aaaa aaab aaac aaal aaas aaba aabb aabc aabl aabt aaca aacb aacc aacl aacs aact aala aalc aall aals aasa aasc aass aast aata aatc aatt abaa abab abac abal abas abat abb- abba abbb abbs abbt abca abcb abcc abcl abcs abct abla abls abs- absa absl abss abta abts ac-t acaa acab acac acas acat acba acbl acca accc accs acct acla aclc acls acsa acsc acsl acss acst acta actc actl acts actt alaa alac alal alas alat alb- alba albc albs alca alcc alcs all- alla alll alls alsa alsc alst alta alts asaa asab asac asal asas asat asba asc- asca ascb ascc ascl asct asla assa assc assl asss asst asta astb astc astl asts at-l at-t ataa atab atac atal atas atat atbs atca atcc atcl atcs atla atls atsb atsc atst atta atts baaa baal baas baat baba babb babs bac- baca bacc bacs bact bala balc ball bals balt basa basc bass bast bata batc bats batt bbas bbbb bbbs bblb bbls bcaa bcas bcat bcbc bcbs bcca bccc bccl bccs bcsa bcsc bcsl bcss bctc bcts blaa blab blac blas blat blbt blls blss blst blts bsaa bsac bsas bsat bscs bslc bssc bsts btaa btcc btcl btcs btla btss bttb caaa caab caac caal caas caat caba cabs cac- caca cacc cala calc call cals calt casa casb casc casl cass cast cat- cata catb catc cats catt cbac cbal cbat cbbc cbbs cbca cbcc cbcl cbcs cbct cblb cblc cbsa cbsc cbta cbtc cbtl ccaa ccab ccac ccas ccat ccba ccbc ccca cccb cccc cccl cccs ccla cclc ccls ccsa ccsl ccss ccst cctb cctc cctl cctt clab clas clat clsa clsc cltb cltc clts csaa csab csac csas csat cscb cscc cscl cscs csla cssa csta cstc csts ctab ctal ctba ctbs ctca ctls ctsa ctsc ctss ctta ctts laaa laac laal laas laat laba labs laca lacc lacl lacs lact lala lall lasa lass last lata latc lats latt lbcc lbsc lcac lcat lcbc lcca lccc lccs lcls lcsc lctl lcts llat llbs llcc llcs lllc llll lsat lscb lscs lsla lssa lsts ltac ltbl ltcc ltcs ltsa lttc sa-c saab saac saal saas saat saba sabb sabc sabs saca sacc sacs sact sala salc sall sals salt sasa sasc sasl sass sast sata satb satc satl sats satt sbaa sbac sbas sbbs sbca sbcc sbcs sbct sbsa sbst sbtc scaa scab scac scal scas scat scba sccc sccl sccs scct scl- sclc scls scsa scsc scsl scst sctc sctl scts slaa slab slac slas slat slcc slsa slsc slst slts ssaa ssab ssac ssas ssat ssca sscc sscs ssla sslc sslt sssa sssb sssc ssss ssta sstb sstc sstl ssts stab stac stal stas stat stbc stbs stca stcc stcs stlc stlt stss sttc taa- taal taas taat taba tabb tabc tabl tabs taca tacc tacl tacs tact tala talc tall tals tasa tasb tasc tass tast tata tatb tats tatt tbas tbbs tbca tbcb tbcc tbst tbta tcbs tcca tccc tctc tcts tlac tsaa tsal tsat tsbc tsca tscc tssa tsst tstc tsts ttab ttbb ttss tttt