a-ii aaaa aaab aaac aaai aaar aaas aaba aabb aabc aabi aaca aacb aacc aaci aacr aacs aaib aaic aaii aais aara aarc aari aars aasa aasc aasi aass abaa abab abac abai abaj abar abas abb- abba abbb abbi abbr abbs abca abcb abcc abci abcr abcs abia abib abic abir abis abjs abra abrc abri abrs abs- absa absi abss acaa acab acac acai acar acas acba acca accc acci accs aci- acia acic acir acis acr- acra acrc acri acrr acrs acsa acsc acsi acss aiai aias aiba aica aicc aicr aics aiia aiib aiic aiir aija aira airi airs aisa aisb aisi aisj aisr ajab ajac ajar ajas ajba ajis ajri ajss arab arac arai arar aras arba arbi arbs arc- arca arci arcs aria arib arii arij aris arja arr- arra arrc arri arrr arrs ars- arsa arsc arsi asaa asab asac asai asar asas asba asc- asca ascb ascc asci ascj ascr asia asic asii asij asir asis asja asra asrc asrs assa assc assi assr asss ba-i baaa baar baas baba babb babi babr babs bac- baca bacc baci bacs baia baib baic bair bais baja baji bajs bar- bara barb barc bari barr bars basa basc basi bass bbas bbbb bbbs bbci bbrc bcaa bcar bcas bcbc bcbs bcca bccc bcci bccs bcia bcis bcra bcrs bcsa bcsc bcss biaj biar bias biba bibb bibi bibs bica bicc bici bics biis bija biji bijs bira birb biri birr birs bis- bisa bisc biss bjcc brab brac brai braj bras brca brcb bria bric bris brrr brrs brsb brsr bsaa bsac bsas bsci bscs bsic bsra bssc caaa caab caac caas caba cabi cabs cac- caca cacc caci cacr caia caib caic cair cais caja caji cara carb carc cari carj carr cars casa casb casc casi casr cass cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbia cbir cbrj cbsa cbsc cbsi ccaa ccab ccac ccai ccar ccas ccba ccbc ccca cccb cccc ccci cccs ccic ccii ccir ccis ccra ccrc ccri ccrs ccsa ccsi ccss ciaa ciar cias ciba cibc cibi cica cicc cici cicr cics ciia ciii ciis cira cirb circ ciri cirr cirs cis- cisa cisc cisr ciss cjar cjbc cjca cjcb cjcj cjcs cjic cjrb cjrc cjrj cjrs cjsb cjss crab crac crai craj crar cras crbc crca crcc crcr cria crib cric cris crsa crss csaa csab csac csar csas cscb cscc csci cscr cscs csia csib csir csis csra csrc csrs cssa cssr iaaa iaac iaai iaas iaba iaca iacc iacr iacs iaia iais iara iarc iars iasa iasc iasi iasr ibac ibar ibas ibca ibcs ibia ibis ibra ibrc ibri ibsa ibss icaa icab icac icai icar icas icbc icbs icca iccb iccc icci iccr iccs icis icra icrc icrr icrs icsa icsb icsc icsi icsr icss iiac iias iica iiii iiis iira iirc iirs iisc iisi iisj iisr ijji irac irai iraj irar iras irca ircc ircs iri- iria iric iris irra irrc irri irrs irsa is-a isac isai isar isas isba isca iscc isci iscr iscs isia isic isis isra isri issa issc issi issr isss jaar jaas jaba jabi jabr jabs jaca jacc jaci jacs jair jais jaja jaji jara jarc jari jarr jars jasa jasc jass jbaa jbar jcbc jccc jcci jcrc jcss jias jibb jibi jibs jiji jira jiri jisa jisc jjar jjcc jrbr jsci jssr jsss raab raaj raas raba rabb rabi rabs rac- raca racc raci racs raia raic raii rair rais raja raji rajs rara rarb rari rars rasa rasc rasi rass rbbb rbbr rbbs rbis rbss rcac rcas rcbc rccb rccc rccs rcic rcis rcsa rcsc rcsi rcss riaa riab riai rias rib- riba ribs rica ricc rics riia riis riji rijs riri rirs risa risc risi riss rras rrrr rsaa rsai rsaj rsbi rscc rscs rsis rssa s-ib s-ic s-ii sa-c saab saac saaj saar saas saba sabb sabc sabi sabr sabs saca sacc saci sacr sacs saia saic sair sais saja sara sarc sari sarr sars sasa sasc sasi sass sbaa sbac sbai sbar sbas sbbs sbca sbcc sbcs sbia sbic sbsa sbsi scaa scab scac scai scar scas scba scbi sccc sccs sci- scia scic scir scis scr- scra scrc scri scrs scsa scsc scsi scsr siaa siab siac siai sias siba sibc sibi sibs sica sicc sici sics sira sirc siri sirr sirs sisa sisc sisi siss sjab sjac sjcc sjcs sjis sras srbc srcc srib sris ssaa ssab ssac ssas ssbr ssca sscc ssci sscs ssis ssra ssrc ssri ssrs sssa sssb sssc sssi ssss