a-ii aaaa aaab aaac aaaf aaai aaar aaas aaba aabb aabc aabi aaca aacb aacc aacf aaci aacr aacs aafa aafb aafc aaff aafi aaib aaic aaii aais aara aarc aari aars aasa aasc aasf aasi aass abaa abab abac abaf abai abar abas abb- abba abbb abbi abbr abbs abca abcb abcc abcf abci abcr abcs abff abia abib abic abir abis abra abrc abri abrs abs- absa absf absi abss acaa acab acac acai acar acas acba acca accc accf acci accs acfc acfi acfs aci- acia acic acif acir acis acr- acra acrc acri acrr acrs acsa acsc acsi acss afaa afar afbs afca afcb afcc afci afcs affa affc affi affs afia afib afif afir afis afr- afra afrc afri afrs afsa afsb afsc aiai aias aiba aica aicc aicf aicr aics aiff aifs aiia aiib aiic aiir aira airi airs aisa aisb aisi aisr arab arac araf arai arar aras arba arbi arbs arc- arca arci arcs arfa arfb arfc arff arfs aria arib arif arii aris arr- arra arrc arri arrr arrs ars- arsa arsc arsi asaa asab asac asaf asai asar asas asba asc- asca ascb ascc asci ascr asfa asfi asia asic asif asii asir asis asra asrc asrs assa assc assi assr asss ba-i baaa baaf baar baas baba babb babi babr babs bac- baca bacc baci bacs bafc baff baia baib baic bair bais bar- bara barb barc barf bari barr bars basa basc basf basi bass bbas bbbb bbbs bbci bbfc bbrc bcaa bcar bcas bcbc bcbs bcca bccc bcci bccs bcfc bcia bcis bcra bcrs bcsa bcsc bcss bfas bfca bfcs bffs bfsi bfsr biaf biar bias biba bibb bibi bibs bica bicc bici bics bifa biff bifi biis bira birb biri birr birs bis- bisa bisc biss brab brac braf brai bras brca brcb brfc bria bric bris brrr brrs brsb brsr bsaa bsac bsas bsci bscs bsfa bsfc bsff bsfs bsic bsra bssc caaa caab caac caaf caas caba cabf cabi cabs cac- caca cacc caci cacr cafa cafb cafc caff cafs caia caib caic cair cais cara carb carc carf cari carr cars casa casb casc casi casr cass cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbfb cbfc cbia cbir cbsa cbsc cbsi ccaa ccab ccac ccaf ccai ccar ccas ccba ccbc ccca cccb cccc cccf ccci cccs ccfa ccfc ccff ccfi ccic ccii ccir ccis ccra ccrc ccrf ccri ccrs ccsa ccsf ccsi ccss cfaa cfab cfac cfar cfbc cfbr cfbs cfca cfcb cfcf cfcs cffb cffr cfia cfra cfrb cfsa cfsi ciaa ciar cias ciba cibc cibi cica cicc cici cicr cics cifa ciff cifs ciia ciii ciis cira cirb circ ciri cirr cirs cis- cisa cisc cisr ciss crab crac craf crai crar cras crbc crca crcc crcr crfc crfs cria crib cric crif cris crsa crss csaa csab csac csar csas csbf cscb cscc cscf csci cscr cscs csfc csfr csia csib csir csis csra csrc csrs cssa cssr faaa faac faas faba fabi fabs faca facc facs fafa fafc faff fafi fair fais fara farb farc farr fars fasa fasc fasi fass fbar fbis fbrs fcab fcar fcas fcba fcbs fcca fccf fcic fcii fcra fcsc ffar ffcc ffff ffii ffrr ffsa ffss fiaa fiac fiaf fiar fias fiba fibs fica ficc fics fifa fifc fiff fifi fiii fira firs fisa fisc fisi fiss frab frac fras frbc frcc frfc fria frib fric fris frsb frsc fsai fsas fscb fscc fsfi fsia fsra fssa fssc fssf iaaa iaac iaai iaas iaba iaca iacc iacr iacs iafc iaff iaia iais iara iarc iars iasa iasc iasi iasr ibac ibar ibas ibca ibcs ibfi ibia ibis ibra ibrc ibri ibsa ibsf ibss icaa icab icac icaf icai icar icas icbc icbs icca iccb iccc iccf icci iccr iccs icfb icis icra icrc icrf icrr icrs icsa icsb icsc icsi icsr icss ifaa ifac ifar ifas ifbb ific ifis ifra ifrb ifrf ifri ifsa ifsb ifsc iiac iias iica iifa iiii iiis iira iirc iirs iisc iisi iisr irac iraf irai irar iras irca ircc ircs iri- iria iric iris irra irrc irri irrs irsa irsf is-a isac isaf isai isar isas isba isca iscc isci iscr iscs isfa isfc isia isic isis isra isri issa issc issf issi issr isss raab raaf raas raba rabb rabi rabs rac- raca racc raci racs rafa rafc raff rafi raia raic raif raii rair rais rara rarb rarf rari rars rasa rasc rasi rass rbaf rbbb rbbr rbbs rbis rbss rcac rcaf rcas rcbc rccb rccc rccs rcfc rcic rcis rcsa rcsc rcsi rcss rffc rfic riaa riab riai rias rib- riba ribs rica ricc rics rifa riff rifs riia riif riis riri rirs risa risc risi riss rras rrfc rrif rrrr rsaa rsaf rsai rsbi rscc rscs rsfc rsis rssa s-ib s-ic s-ii sa-c saab saac saaf saar saas saba sabb sabc sabi sabr sabs saca sacc saci sacr sacs safa safb safc saff safi safr saia saic saif sair sais sara sarc sarf sari sarr sars sasa sasc sasf sasi sass sbaa sbac sbai sbar sbas sbbs sbca sbcc sbcs sbfc sbia sbic sbsa sbsi scaa scab scac scaf scai scar scas scba scbi sccc sccs scfa scfc scfi sci- scia scic scif scir scis scr- scra scrc scri scrs scsa scsc scsi scsr sfar sfas sfba sfbc sfca sfcc sfcs sffc sfia sfra sfrc sfss siaa siab siac siaf siai sias siba sibc sibi sibs sica sicc sici sics sifa siff sifr sira sirc sirf siri sirr sirs sisa sisc sisi siss sraf sras srbc srcc srfc srfi srib sris ssaa ssab ssac ssas ssbr ssca sscc ssci sscs ssfc ssis ssra ssrc ssri ssrs sssa sssb sssc sssf sssi ssss