a-ak a-ii aaaa aaab aaac aaaf aaai aaar aaas aaba aabb aabc aabi aaca aacb aacc aacf aaci aack aacr aacs aafa aafb aafc aaff aafi aaib aaic aaii aais aaka aara aarc aari aars aasa aasc aasf aasi aass abaa abab abac abaf abai abak 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 acks acr- acra acrc acri acrr acrs acsa acsc acsi acss afaa afak afar afbs afca afcb afcc afci afcs affa affc affi affs afia afib afif afik afir afis afka afkr afr- afra afrc afri afrs afsa afsb afsc aiai aias aiba aica aicc aicf aicr aics aiff aifs aiia aiib aiic aiir aika aiki aiks aira airi airs aisa aisb aisi aisk aisr akaa akai akar akas akca akia akif akik akir akis akka akki akr- akra aksa aksi arab arac araf arai arak arar aras arba arbi arbs arc- arca arci arcs arfa arfb arfc arff arfs aria arib arif arii arik aris arka arki arks arr- arra arrc arri arrk arrr arrs ars- arsa arsc arsi arsk asaa asab asac asaf asai asak asar asas asba asc- asca ascb ascc asci ascr asfa asfi asia asic asif asii asik asir asis aska aski askr asks asra asrc asrs assa assc assi assk assr asss ba-i baaa baaf baak baar baas baba babb babi babr babs bac- baca bacc baci back bacs bafc baff baia baib baic baik bair bais bak- baka baki bakr baks bar- bara barb barc barf bari bark barr bars basa basc basf basi bask 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 biak biar bias biba bibb bibi bibs bica bicc bici bick bics bifa biff bifi biis bira birb biri birk birr birs bis- bisa bisc bisk biss brab brac braf brai brak bras brca brcb brfc bria bric brik bris brka brkb 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 cack cacr cafa cafb cafc caff cafs caia caib caic caik cair cais caka cara carb carc carf cari cark carr cars casa casb casc casi cask casr cass cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbfb cbfc cbia cbir cbka cbkr 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 ciak ciar cias ciba cibc cibi cica cicc cici cicr cics cifa ciff cifs ciia ciii ciis cika cikr cira cirb circ ciri cirk cirr cirs cis- cisa cisc cisk cisr ciss ckac ckbc ckbi ckck ckcs ckfi ckfr ckrc cksa cksb crab crac craf crai crar cras crbc crca crcc crcr crfc crfs cria crib cric crif crik cris crkc crsa crss csaa csab csac csak csar csas csbf cscb cscc cscf csci cscr cscs csfc csfr csia csib csik csir csis cska csks csra csrc csrs cssa cssr f--k faaa faac faas faba fabi fabs faca facc fack facs fafa fafc faff fafi faik fair fais faki fara farb farc fark 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 fick fics fifa fifc fiff fifi fiii fika fiki fira firk firs fisa fisc fisi fisk fiss fkab frab frac frak fras frbc frcc frfc fria frib fric frik fris frsb frsc fsai fsas fscb fscc fsck 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 iask 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 icks 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 ikar ikki ikra ikri irac iraf irai irak irar iras irca ircc ircs iri- iria iric iris irka irki irks irra irrc irri irrs irsa irsf is-a isac isaf isai isak isar isas isba isca iscc isci iscr iscs isfa isfc isia isic isis iska iskf isra isri issa issc issf issi issr isss k-ci kaaa kaab kaaf kaai kaak kaar kaas kaba kabb kabc kabf kabi kabr kacb kacc kaci kacs kafa kafc kaff kafi kafr kafs kaia kaib kaic kaif kaii kaik kair kais kaka kakc kaki kakk kaks kara karb karf kari kark karr kars kas- kasa kasb kasc kasf kasi kask kasr kass kbaa kbab kbac kbai kbak kbar kbas kbba kbbb kbbc kbbf kbbi kbbk kbbr kbbs kbca kbcb kbci kbck kbcr kbcs kbfb kbfc kbff kbfi kbfk kbfr kbfs kbia kbib kbic kbif kbik kbis kbkb kbkf kbkk kbkr kbra kbrb kbrc kbrf kbri kbrk kbsa kbsb kbsi kbsk kbsr kbss kcaa kcab kcac kcai kcar kcas kcba kcbc kcbf kcbi kcbk kcbr kcbs kcca kccb kccc kcci kcck kccr kcfa kcfb kcfc kcfi kcic kcif kcii kcir kcis kckc kckf kckk kckr kcrc kcri kcrr kcrs kcsa kcsb kcsc kcsf kcsi kcsr kcss kfab kfac kfai kfar kfbc kfbk kfcf kfcr kfcs kffa kffb kfff kffk kfia kfir kfis kfka kfkb kfra