a-ak aaaa aaab aaac aaal aaap aaas aaba aabb aabc aabl aabp aaca aacb aacc aack aacl aacp aacs aaka aala aalc aall aals aapa aapc aapl aaps aasa aasc aass abaa abab abac abak abal abap abas abb- abba abbb abbs abca abcb abcc abcl abcp abcs abla abls abpa abpc abpp abps abs- absa absl absp abss acaa acab acac acap acas acba acbl acca accc accp accs acks acla aclc acls acpa acps acsa acsc acsl acss akaa akal akap akas akca akka aksa al-p alaa alac alak alal alap alas alb- alba albc albs alca alcc alcs alk- alka alkb all- alla alll alls alpa alpl alps alsa alsc apac apak apal apap apas apba apbs apca apcb apcc apcs apl- apla aplp apls appa appc appl apps apsa apsl apss asaa asab asac asak asal asap asas asba asc- asca ascb ascc ascl ascp aska asks asla aspa aspc aspl asps assa assc assk assl assp asss baaa baak baal baas baba babb babs bac- baca bacc back bacs bak- baka bakl baks bala balc balk ball bals bapa bapc bapp baps basa basc bask bass bbas bbbb bbbs bblb bbls bcaa bcap bcas bcbc bcbp bcbs bcca bccc bccl bccs bcpl bcpp bcps bcsa bcsc bcsl bcss bksp blaa blab blac blak blas blkb blls blsp blss bpcp bpsa bsaa bsac bsap bsas bscp bscs bslc bspp bssc caaa caab caac caal caap caas caba cabs cac- caca cacc cack caka cala calc calk call calp cals capa capb capc capp caps casa casb casc cask casl casp cass cbac cbal cbbc cbbs cbca cbcc cbcl cbcp cbcs cbka cbkl cblb cblc cbpc cbpp cbsa cbsc ccaa ccab ccac ccap ccas ccba ccbc ccca cccb cccc cccl cccp cccs ccla cclc ccls ccpa ccpl ccpp ccps ccsa ccsl ccsp ccss ckac ckbc ckck ckcl ckcs ckpc cksa cksb cksl clab clap clas clpb clpp clsa clsc cpaa cpac cpap cpas cpbc cpca cpcs cplc cpls cppa cpps cpsa cpsc cpsk cpsl csaa csab csac csak csas cscb cscc cscl cscs cska csks csla cslp cspa cspb cspc csps cssa kaaa kaab kaak kaal kaap kaas kaba kabb kabc kacb kacc kacl kacp kacs kaka kakc kakk kaks kala kalb kalc kalk kall kalp kals kap- kapa kapc kapl kapp kaps kas- kasa kasb kasc kask kasl kasp kass kbaa kbab kbac kbak kbal kbap kbas kbba kbbb kbbc kbbk kbbl kbbs kbca kbcb kbck kbcl kbcs kbkb kbkk kbkl kbla kblb kbll kblp kbls kbpa kbpc kbpk kbps kbsa kbsb kbsk kbss kcaa kcab kcac kcal kcap kcas kcba kcbc kcbk kcbl kcbs kcca kccb kccc kcck kccl kckc kckk kckl kcla kclc kclk kcll kcls kcpa kcpc kcpl kcps kcsa kcsb kcsc kcsp kcss kkaa kkac kkal kkap kkba kkbb kkbl kkbs kkcb kkck kkcl kkcs kkkk kklb kklc kkll kkls kkpc kkpk kkpl kkps kksa kksp kkss klaa klab klac klak klal klap klas klbb klbc klbl klbs klca klcb klcc klck klcl klcs klka klkc klkk klkl klks klla kllb kllc kllk kllp klls klpc klsa klsc kpac kpak kpal kpas kpba kpbb kpbl kpbs kpcc kpcl kpcs kpkk kpkl kpla kplc kplk kppc kppk kppl kppp kpsc kpsp ksab ksac ksak ksal ksas ksba ksbc ksbl ksbp ksbs ksca kscb ksck kscl kscs kska kskb kskk ksks ksla kslb kslc kslk ksll kspa kspb kspc kspk kspl ksps kssa kssl ksss laaa laac laak laal laap laas laba labs laca lacc lack lacl lacp lacs laka laks lala lall lapa lapb lapc lapp laps lasa lask lass lbcc lbsc lcac lcbc lcca lccc lccs lcls lcpa lcpc lcpl lcps lcsc lcsp lkab lkal llbs llcc llcs llks lllc llll llps lpac lpla lppl lpsc lpss lsap lscb lscs lsla lspl lssa lssp paak paal paap paas paba paca pack pacs paka paks pala palk pall palp pals papa papb papp paps pasa pasc pask pasl pasp pass pbac pbcc pbpa pbpk pbsa pbsp pcaa pcap pcas pcba pcbc pcbs pcca pccc pccl pccs pcks pclk pcll pcpb pcpp pcps pcsa pkcs plaa plab plac plak plap plas plcc plkk plpa plpp plss ppac ppal ppap ppcc ppcs pppa pppp ppps ppss psac psap psas psca pspp psps pssa pssc sa-c saab saac saak saal saap saas saba sabb sabc sabs saca sacc sack sacs saka sakb sakk saks sala salc salk sall salp sals sapa sapp saps sasa sasc sask sasl sass sbaa sbac sbas sbbs sbca sbcc sbcs sbsa sbsp scaa scab scac scak scal scap scas scba sccc sccl sccp sccs sck- sckl scl- sclc sclk scls scpa scpb scpl scps scsa scsc scsl skab skac skal skap skpc skss slaa slab slac slak slap slas slbp slcc sllp slpp slps slsa slsc sp-a spac spak spal spap spas spca spcc spcs spkl spla splc splp spls spps spsa spsp spss ssaa ssab ssac ssap ssas ssca sscc sscp sscs ssla sslc sslp sspa sspc sspl ssps sssa sssb sssc ssss