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 abar abas abb- abba abbb abbi abbr abbs abca abcb abcc abci abcr abcs abia abib abic abir abis 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 aira airi airs aisa aisb aisi aisr arab arac arai arar aras arba arbi arbs arc- arca arci arcs aria arib arii aris arr- arra arrc arri arrr arrs ars- arsa arsc arsi asaa asab asac asai asar asas asba asc- asca ascb ascc asci ascr asia asic asii asir asis 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 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 biar bias biba bibb bibi bibs bica bicc bici bics biis bira birb biri birr birs bis- bisa bisc biss brab brac brai 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 cara carb carc cari carr cars casa casb casc casi casr cass cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbia cbir 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 crab crac crai 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 iisr irac irai 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 raab raas raba rabb rabi rabs rac- raca racc raci racs raia raic raii rair rais 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 riri rirs risa risc risi riss rras rrrr rsaa rsai rsbi rscc rscs rsis rssa s-ib s-ic s-ii sa-c saab saac saar saas saba sabb sabc sabi sabr sabs saca sacc saci sacr sacs saia saic sair sais 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 sras srbc srcc srib sris ssaa ssab ssac ssas ssbr ssca sscc ssci sscs ssis ssra ssrc ssri ssrs sssa sssb sssc sssi ssss