a-ii aaaa aaab aaac aaad aaai aaas aaba aabb aabc aabd aabi aaca aacb aacc aacd aaci aacs aacu aada aadc aadi aads aadu aaib aaic aaii aais aasa aasc aasd aasi aass aasu aaus abaa abab abac abad abai abas abau abb- abba abbb abbi abbs abca abcb abcc abcd abci abcs abda abdi abdu abia abib abic abid abis abiu abs- absa absd absi abss absu abua abud abus acaa acab acac acad acai acas acba acca accc accd acci accs accu acda acdb acdc acdi acds aci- acia acic acid acis acsa acsc acsd acsi acss acu- acus adaa adab adac adad adai adas adba adbc adbi adcc adci adcs adda addc addd addi adds addu adia adib adic adis adsa adsi adss adua adub aiai aias aiba aica aicc aicd aics aida aidb aidc aidi aids aidu aiia aiib aiic aiid aisa aisb aisd aisi aiud aiui asaa asab asac asad asai asas asau asba asbu asc- asca ascb ascc asci asda asds asia asic asii asis assa assc assd assi asss assu asub asud asui asus auaa auca auci audc audi auis ausa ausd ausu ba-i baaa baad baas baba babb babi babs babu bac- baca bacc baci bacs bada badb badd badi bads badu baia baib baic baid bais basa basc basi bass basu bau- baud bbad bbas bbau bbbb bbbs bbci bbdd bcaa bcas bcbc bcbs bcca bccc bcci bccs bcda bcds bcia bcis bcsa bcsc bcss bcuc bdbc bddc bdii bdsd biad bias biba bibb bibi bibs bica bicc bici bics bida bidi bids bidu biis bis- bisa bisc bisd biss bisu bsaa bsac bsas bsbd bsci bscs bsic bssc bssd buad buba bubb bubi bubs bubu buca bucc buci bucs bucu buda budb budd budi buds budu buic buid buis buiu busa busc busi buss busu buus c-cd caaa caab caac caas caba cabi cabs cabu cac- caca cacc caci cada cadc cadd cadi cads cadu caia caib caic caid cais caiu casa casb casc casd casi cass casu cauc caus cbac cbbc cbbs cbca cbcc cbcs cbcu cbdb cbdc cbdi cbds cbia cbid cbsa cbsc cbsi cbus ccaa ccab ccac ccad ccai ccas ccba ccbc ccca cccb cccc ccci cccs cccu ccdc ccdi ccds ccic ccid ccii ccis ccsa ccsd ccsi ccss ccuc ccus cdaa cdac cdad cdai cdba cdcs cdda cddb cdic cdii cdis cdss ciaa cias ciau ciba cibc cibi cica cicc cici cics cicu cida cidc cidi cids ciia ciid ciii ciis cis- cisa cisc cisd ciss ciuc cius csaa csab csac csas cscb cscc cscd csci cscs csda csdb csia csib csid csis cssa cssd csua csus cuau cub- cuba cubb cubi cubs cuca cucc cuci cuda cudi cuds cui- cuis cusa cusb cusd cuss cusu daab daad daas daau daba dabb dabs dabu daca daci dacs dada dadi dads dadu daia daid dais dasa dasb dasc dasd dasi dass daub daud daus dbas dbcc dbcs dbsa dbss dbus dcas dcbc dcca dccb dccc dcci dccs dccu dcdb dcds dcia dcii dcis dcsc dcss dddd ddss ddub dia- diab diac diad dias diba dibb dibs dica dici dida didi dids didu diii diis dis- disa disc disd disi diss dius dsac dsba dsbc dscc dscs dsda dssa dssc dssi duaa duab duad duas dub- duba dubb dubc dubs dubu duca ducs duda dudd duds dudu duid duis dusa dusi iaaa iaac iaai iaas iaba iaca iacc iacs iacu iadb iadc iaia iais iasa iasc iasi ibac ibad ibas ibca ibcs ibia ibid ibis ibsa ibss ibus icaa icab icac icad icai icas icbc icbd icbs icca iccb iccc icci iccs iccu icdc icdd icis icsa icsb icsc icsd icsi icss icub icus idad idas idca idda idia idic idid idis idsa idsc idss idub idus iiac iias iica iicd iida iiii iiis iisc iisd iisi iisu iiuc is-a isac isad isai isas isba isbd isca iscc iscd isci iscs iscu isda isdb isdc isds isia isic isis issa issc issi isss issu isua isus iucc iuds iuiu iusd iuss s-ib s-ic s-ii sa-c saab saac saad saas saba sabb sabc sabi sabs sabu saca sacc sacd saci sacs sacu sada sadb sadc sadd sadi sads sadu saia saic said sais sasa sasc sasd sasi sass saua sauc saud saus sbaa sbac sbai sbas sbbs sbca sbcc sbcs sbds sbia sbic sbsa sbsd sbsi sbus scaa scab scac scad scai scas scba scbi sccc sccs scda scdc scds sci- scia scic scid scis scsa scsc scsd scsi scsu scua scub scud sdau sdba sdcc sddc sdds sdib sdic sdsc sdss sdsu siaa siab siac siai sias siau siba sibc sibi sibs sibu sica sicc sici sics sicu sida sidd sidi sids sisa sisc sisd sisi siss sisu siui sius ssaa ssab ssac ssas ssau ssca sscc ssci sscs ssdc ssdd ssid ssis sssa sssb sssc sssi ssss suas sub- suba subb subd subi subs suc- succ suci sucs suda sudd sudi suds suid suis sus- susa susd susi suss susu suus uabc uaca uasa uasd uaua ubac ubba ubbi ubic ubid ubii ubis ubud ucad ucai ucas ucbc ucca ucci ucdc ucdd ucsa ucsb ucsc ucsd ucsu ucua udaa udad udas udau udbc udca uddi udds udic udid udsd uica uisd us-a usaa usac usad usas usba usbc usbs usca uscc uscs usda usdc usds usia usis ussa ussb ussc usss ussu usua usui usus uusi uuuu