-al a-a a-b a-c aaa aab aac aal aar aas ab- aba abb abc abl abr abs ac- aca acb acc acl acr acs al- ala alb alc all alr als ar- ara arb arc arl arr ars as- asa asb asc asl asr ass baa bab bac bal bar bas bba bbb bbc bbl bbr bbs bca bcb bcc bcl bcr bcs bla blb blc bll blr bls bra brb brl brr brs bsa bsb bsc bsl bsr bss c-- caa cab cac cal car cas cba cbb cbc cbl cbr cbs cca ccb ccc ccl ccr ccs cl- cla clb clc cll clr cls cra crb crc crl crr crs csa csb csc csl csr css la- laa lab lac lal lar las lba lbb lbc lbl lbr lbs lca lcb lcc lcl lcr lcs lla llb llc lll llr lls lra lrb lrc lrr lrs lsa lsb lsc lsl lsr lss ra- raa rab rac ral rar ras rba rbb rbc rbl rbr rbs rca rcb rcc rcl rcr rcs rla rlc rll rlr rls rra rrb rrc rrl rrr rrs rsa rsb rsc rsl rsr rss saa sab sac sal sar sas sba sbb sbc sbl sbr sbs sca scb scc scl scr scs sla slb slc sll slr sls sr- sra srb src srl srr srs ss- ssa ssb ssc ssl ssr sss

aaaa aaab aaac aaal aaar aaas aaba aabb aabc aabl aaca aacb aacc aacl aacr aacs aala aalc aall aals aara aarc aars aasa aasc aass abaa abab abac abal abar abas abb- abba abbb abbr abbs abca abcb abcc abcl abcr abcs abla abls abra abrc abrs abs- absa absl abss acaa acab acac acar acas acba acbl acca accc accs acla aclc aclr acls acr- acra acrc acrr acrs acsa acsc acsl acss alaa alac alal alar alas alb- alba albc albs alca alcc alcs all- alla alll allr alls alsa alsc arab arac aral arar aras arba arbs arc- arca arcs arla arr- arra arrc arrr arrs ars- arsa arsc asaa asab asac asal asar asas asba asc- asca ascb ascc ascl ascr asla aslr asra asrc asrs assa assc assl assr asss baaa baal baar baas baba babb babr babs bac- baca bacc bacs bala balc ball bals bar- bara barb barc barr bars basa basc bass bbas bbbb bbbs bblb bbls bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccl bccs bcra bcrs bcsa bcsc bcsl bcss blaa blab blac blas blls blrc blss brab brac bras brca brcb brls brrr brrs brsb brsr bsaa bsac bsas bscs bslc bsra bssc caaa caab caac caal caas caba cabs cac- caca cacc cacr cala calc call cals cara carb carc carl carr cars casa casb casc casl casr cass cbac cbal cbar cbbc cbbs cbca cbcc cbcl cbcr cbcs cblb cblc cbrl cbsa cbsc ccaa ccab ccac ccar ccas ccba ccbc ccca cccb cccc cccl cccs ccla cclc ccls ccra ccrc ccrl ccrs ccsa ccsl ccss clab clar clas clra clrs clsa clsc crab crac crar cras crbc crca crcc crcr crls crsa crss csaa csab csac csar csas cscb cscc cscl cscr cscs csla cslr csra csrc csrs cssa cssr laaa laac laal laar laas laba labr labs laca lacc lacl lacs lala lall lara larb larc larr lars lasa lass lbar lbcc lblr lbrs lbsc lcac lcbc lcca lccc lccs lcls lcra lcrl lcrs lcsc lcsr llbs llcc llcs lllc llll lrac lral lrba lrcs lrrc lrrr ls-r lscb lscs lsla lsrc lssa lssr raab raas raba rabb rabl rabs rac- raca racc racs rala ralb rall rara rarb rars rasa rasc rasl rass rbbb rbbr rbbs rbcl rbsl rbss rcac rcas rcbc rccb rccc rccs rcls rcsa rcsc rcsl rcss rlab rlcs rlls rras rrrr rsaa rscc rscs rslc rssa rssl sa-c saab saac saal saar saas saba sabb sabc sabr sabs saca sacc sacr sacs sala salc sall sals sara sarc sarl sarr sars sasa sasc sasl sass sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbsa scaa scab scac scal scar scas scba sccc sccl sccs scl- sclc scls scr- scra scrc scrs scsa scsc scsl scsr slaa slab slac slas slcc slrc slrs slsa slsc sras srbc srcc ssaa ssab ssac ssas ssbr ssca sscc sscs ssla sslc ssra ssrc ssrl ssrs sssa sssb sssc ssss

-aaa- aaaas aaarc aaasa aaass aabaa aabba aabra aacbc aacsa aacsb aacsl aacss aasra abaab ababa ababs abaca abacs abala aball abara abasa abass abbac abbar abbas abbrs abcas abccc abrac abrar abras absar acaca acacb acala acall acar- acara acars acass accas accra aclla acrab acral alaba alaca alala alara alars alasa alass albac albal albar albas alcra allal allar allas allra allss alsab ar-ab ara-c arab- araba arabs araca arara arars arass arbab arbar arbas arcas arras arsac arsal asaba asabc asala asall asara asasa asbca ascar aslab asrar assab assac assal assas b-cas baalc baals baars babar babas babbs babra bacab bacar bacas bacca balac balal balar balas balca balla balls balsa baraa barab barac baral barar baras barba barbs barca barcs barla barra barrs barsa barss basab basal basar basca basra bassa bball bbsrc bccsl blaas blabs blaca blacc blars blass braal braas braca bracc bracs brall brasa brasc brass brrar brrrr bsaba c-a-c ca-ca caaba cabal cabas cabra cabrl cacas cacls calas calc- calca calcs calla callb calls caraa carab carac caral caras carb- carbs carla carls carra carrs casal casar casas casca casla cbars ccass ccccc cccsl ccrcl claas clacl clacs clara clars clasa class craal craba crabb crabs crall crars crass crlcs csaba csars cssra la-la labab labas labba labra lacca lalab lalar lalas lalla lalls laras larbs larra larsa lasal lasar lasca lassa lball lbars lcars llaas llrrs lsccb ra-ra raaba raasa rabab rabac rabal rabas rabba racal racsa ralla ralls rasac rasar rasas rasca rasra rassa rccar rsbac sa-ra saaba saabs saala saara saasa sabac sabal sabar sabas sabca sabla sabra sabsa sacar sacas sacc- sacca sacla