a-ii aaaa aaab aaac aaad aaai aaas aaba aabb aabc aabd aabi aaca aacb aacc aacd aaci aacs aada aadc aadi aads aaib aaic aaii aais aasa aasc aasd aasi aass abaa abab abac abad abai abas abb- abba abbb abbi abbs abca abcb abcc abcd abci abcs abda abdi abia abib abic abid abis abs- absa absd absi abss acaa acab acac acad acai acas acba acca accc accd acci accs acda acdb acdc acdi acds aci- acia acic acid acis acsa acsc acsd acsi acss adaa adab adac adad adai adas adba adbc adbi adcc adci adcs adda addc addd addi adds adia adib adic adis adsa adsi adss aiai aias aiba aica aicc aicd aics aida aidb aidc aidi aids aiia aiib aiic aiid aisa aisb aisd aisi asaa asab asac asad asai asas asba asc- asca ascb ascc asci asda asds asia asic asii asis assa assc assd assi asss ba-i baaa baad baas baba babb babi babs bac- baca bacc baci bacs bada badb badd badi bads baia baib baic baid bais basa basc basi bass bbad bbas bbbb bbbs bbci bbdd bcaa bcas bcbc bcbs bcca bccc bcci bccs bcda bcds bcia bcis bcsa bcsc bcss bdbc bddc bdii bdsd biad bias biba bibb bibi bibs bica bicc bici bics bida bidi bids biis bis- bisa bisc bisd biss bsaa bsac bsas bsbd bsci bscs bsic bssc bssd c-cd caaa caab caac caas caba cabi cabs cac- caca cacc caci cada cadc cadd cadi cads caia caib caic caid cais casa casb casc casd casi cass cbac cbbc cbbs cbca cbcc cbcs cbdb cbdc cbdi cbds cbia cbid cbsa cbsc cbsi ccaa ccab ccac ccad ccai ccas ccba ccbc ccca cccb cccc ccci cccs ccdc ccdi ccds ccic ccid ccii ccis ccsa ccsd ccsi ccss cdaa cdac cdad cdai cdba cdcs cdda cddb cdic cdii cdis cdss ciaa cias ciba cibc cibi cica cicc cici cics cida cidc cidi cids ciia ciid ciii ciis cis- cisa cisc cisd ciss csaa csab csac csas cscb cscc cscd csci cscs csda csdb csia csib csid csis cssa cssd daab daad daas daba dabb dabs daca daci dacs dada dadi dads daia daid dais dasa dasb dasc dasd dasi dass dbas dbcc dbcs dbsa dbss dcas dcbc dcca dccb dccc dcci dccs dcdb dcds dcia dcii dcis dcsc dcss dddd ddss dia- diab diac diad dias diba dibb dibs dica dici dida didi dids diii diis dis- disa disc disd disi diss dsac dsba dsbc dscc dscs dsda dssa dssc dssi iaaa iaac iaai iaas iaba iaca iacc iacs iadb iadc iaia iais iasa iasc iasi ibac ibad ibas ibca ibcs ibia ibid ibis ibsa ibss icaa icab icac icad icai icas icbc icbd icbs icca iccb iccc icci iccs icdc icdd icis icsa icsb icsc icsd icsi icss idad idas idca idda idia idic idid idis idsa idsc idss iiac iias iica iicd iida iiii iiis iisc iisd iisi is-a isac isad isai isas isba isbd isca iscc iscd isci iscs isda isdb isdc isds isia isic isis issa issc issi isss s-ib s-ic s-ii sa-c saab saac saad saas saba sabb sabc sabi sabs saca sacc sacd saci sacs sada sadb sadc sadd sadi sads saia saic said sais sasa sasc sasd sasi sass sbaa sbac sbai sbas sbbs sbca sbcc sbcs sbds sbia sbic sbsa sbsd sbsi scaa scab scac scad scai scas scba scbi sccc sccs scda scdc scds sci- scia scic scid scis scsa scsc scsd scsi sdba sdcc sddc sdds sdib sdic sdsc sdss siaa siab siac siai sias siba sibc sibi sibs sica sicc sici sics sida sidd sidi sids sisa sisc sisd sisi siss ssaa ssab ssac ssas ssca sscc ssci sscs ssdc ssdd ssid ssis sssa sssb sssc sssi ssss