a-ii aaaa aaab aaac aaai aaar aaas aaba aabb aabc aabi aaca aacb aacc aaci aacr aacs aacu aaib aaic aaii aais aara aarc aari aars aaru aasa aasc aasi aass aasu aaus abaa abab abac abai abar abas abau abb- abba abbb abbi abbr abbs abca abcb abcc abci abcr abcs abia abib abic abir abis abiu abra abrc abri abrs abs- absa absi abss absu abua abus acaa acab acac acai acar acas acba acca accc acci accs accu aci- acia acic acir acis acr- acra acrc acri acrr acrs acsa acsc acsi acss acu- acur acus aiai aias aiba aica aicc aicr aics aiia aiib aiic aiir aira airi airs aisa aisb aisi aisr aiui arab arac arai arar aras arau arba arbi arbs arc- arca arci arcs aria arib arii aris arr- arra arrc arri arrr arrs arru ars- arsa arsc arsi arsu arua arub arui asaa asab asac asai asar asas asau asba asbu asc- asca ascb ascc asci ascr asia asic asii asir asis asra asrc asrs asru assa assc assi assr asss assu asub asui asur asus auaa auca auci auis aur- aura auri ausa ausu ba-i baaa baar baas baba babb babi babr babs babu bac- baca bacc baci bacs baia baib baic bair bais bar- bara barb barc bari barr bars baru basa basc basi bass basu bau- baur bbas bbau bbbb bbbs bbci bbrc bcaa bcar bcas bcbc bcbs bcca bccc bcci bccs bcia bcis bcra bcrs bcru bcsa bcsc bcss bcuc biar bias biba bibb bibi bibs bica bicc bici bics biis bira birb biri birr birs biru bis- bisa bisc biss bisu brab brac brai bras brau brca brcb bria bric bris brrr brrs brsb brsr bruc brus bsaa bsac bsas bsci bscs bsic bsra bssc buar buba bubb bubi bubs bubu buca bucc buci bucs bucu buic buir buis buiu bur- bura burb buri burr burs buru busa busc busi buss busu buus caaa caab caac caas caba cabi cabs cabu cac- caca cacc caci cacr caia caib caic cair cais caiu cara carb carc cari carr cars casa casb casc casi casr cass casu cauc caus cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbcu cbia cbir cbsa cbsc cbsi cbus ccaa ccab ccac ccai ccar ccas ccba ccbc ccca cccb cccc ccci cccs cccu ccic ccii ccir ccis ccra ccrc ccri ccrs ccsa ccsi ccss ccuc ccus ciaa ciar cias ciau ciba cibc cibi cica cicc cici cicr cics cicu ciia ciii ciis cira cirb circ ciri cirr cirs cis- cisa cisc cisr ciss ciuc cius crab crac crai crar cras crau crbc crbu crca crcc crcr cria crib cric cris criu crsa crss crub crus csaa csab csac csar csas cscb cscc csci cscr cscs csia csib csir csis csra csrc csrs cssa cssr csua csur csus cuau cub- cuba cubb cubi cubs cuca cucc cuci cui- cuir cuis cura curb curi curr curs cusa cusb cuss cusu iaaa iaac iaai iaas iaba iaca iacc iacr iacs iacu iaia iais iara iarc iars iaru iasa iasc iasi iasr ibac ibar ibas ibca ibcs ibia ibis ibra ibrc ibri ibsa ibss ibus icaa icab icac icai icar icas icbc icbs icca iccb iccc icci iccr iccs iccu icis icra icrc icrr icrs icru icsa icsb icsc icsi icsr icss icub icus iiac iias iica iiii iiis iira iirc iirs iisc iisi iisr iisu iiuc irac irai irar iras irca ircc ircs ircu iri- iria iric iris irra irrc irri irrs irsa irus is-a isac isai isar isas isba isca iscc isci iscr iscs iscu isia isic isis isra isri issa issc issi issr isss issu isua isus iucc iuiu iura iuss raab raas raba rabb rabi rabs rabu rac- raca racc raci racs racu raia raic raii rair rais raiu rara rarb rari rars rasa rasc rasi rass rasu raua raub rauc raus rbbb rbbr rbbs rbis rbss rcac rcas rcbc rccb rccc rccs rcic rcis rcsa rcsc rcsi rcss riaa riab riai rias riau rib- riba ribs ribu rica ricc rics riia riis riri rirs risa risc risi riss risu rius rras rrrr rsaa rsai rsbi rscc rscs rsis rssa rsua ruas ruba rubb rubi rubs rubu ruca ruci ruis rura rurc ruri rurs ruru rusa rusi russ rusu s-ib s-ic s-ii sa-c saab saac saar saas saba sabb sabc sabi sabr sabs sabu saca sacc saci sacr sacs sacu saia saic sair sais sara sarc sari sarr sars saru sasa sasc sasi sass saua sauc saur saus sbaa sbac sbai sbar sbas sbbs sbca sbcc sbcs sbia sbic sbsa sbsi sbus scaa scab scac scai scar scas scba scbi sccc sccs sci- scia scic scir scis scr- scra scrc scri scrs scsa scsc scsi scsr scsu scua scub scur siaa siab siac siai sias siau siba sibc sibi sibs sibu sica sicc sici sics sicu sira sirc siri sirr sirs siru sisa sisc sisi siss sisu siui sius sras srbc srcc srib sris srub ssaa ssab ssac ssas ssau ssbr ssca sscc ssci sscs ssis ssra ssrc ssri ssrs sssa sssb sssc sssi ssss suar suas sub- suba subb subi subs suc- succ suci sucr sucs suir suis sur- sura surc suri surr surs suru sus- susa susi suss susu suus uabc uaca uair uarc uars uaru uasa uaua ubac ubar ubba ubbi ubic ubii ubir ubis ubra ucai ucar ucas ucbc ucca ucci ucrc ucsa ucsb ucsc ucsu ucua uica uira uirr urac urai uras urau urba urbi urbs urca urci uria urib uric uris uriu urra urri ursa ursi urss ursu urur urus us-a usaa usac usar usas usba usbc usbr usbs usca uscc uscs usia usis usra ussa ussb ussc ussr usss ussu usua usui usus uuri uusi uuuu