a-ha a-ii aaaa aaab aaac aaaf aaah aaai aaba aabb aabc aabh aabi aaca aacb aacc aacf aach aaci aaco aafa aafb aafc aaff aafi aaha aaib aaic aaii aaoo abaa abab abac abaf abai abb- abba abbb abbi abbo abca abcb abcc abcf abch abci abff abha abhi abho abia abib abic aboa abob abof aboh aboo acaa acab acac acai acba acca accc accf acch acci acco acfc acfi acha achh achi acho aci- acia acic acif acoa acoh afaa afao afca afcb afcc afch afci affa affc affi affo afia afib afif afoa afoo ahab ahac ahah ahai ahfa ahha ahio ahoa aiai aiba aibo aica aicc aicf aich aiff aiha aiho aiia aiib aiic aioc aioi aoah aoba aoca ba-i baaa baaf baah baba babb babi babo bac- baca bacc bach baci baco bafc baff bafo baha bahi baho baia baib baic baio baoh bbbb bbch bbci bbfc bcaa bcbc bcca bccc bcci bcfc bcia bcof bfca bhai bhao bhca bhcc bhff bhoi biaf biao biba bibb bibi bibo bica bicc bich bici bico bifa biff bifi biha bihi bio- bioc bioi boab boac boai boba bobb bobi bobo boca boch boco bofa boff bofh boha boho boi- boii boob booc boof booh c-bo caaa caab caac caaf caah caba cabf cabi cabo cac- caca cacc cach caci caco cafa cafb cafc caff caha caia caib caic caio caoi cbac cbbc cbca cbcc cbfb cbfc cbha cbia ccaa ccab ccac ccaf ccai ccba ccbc ccca cccb cccc cccf ccci ccfa ccfc ccff ccfi ccha ccic ccii ccob ccoc cfaa cfab cfac cfao cfbc cfca cfcb cfcf cfco cffb cfia cfoa chaa chab chac chaf chah chai chao chca chch chci chfa chfc chfi chha chia chib chic chif chih choc choh choi choo ciaa ciao ciba cibc cibi cibo cica cicc cich cici cico cifa ciff ciia ciii ciob coai coba cobb cobh cobi cobo coca coch coco cofc coff cofi coha coho coia coif coob coof cooh faaa faac faah faba fabi fabo faca facc fach fafa fafc faff fafi fafo faha faio fcab fcba fcca fccf fcch fcic fcii ffcc ffff ffii fhci fiaa fiac fiaf fiba fica ficc fich fico fifa fifc fiff fifi fifo fiii foaf foba foca foch foci foco fofo foia foof h-ii haab haaf haba habi habo haco hafb haff haha haho haif hbfc hbic hbio hboc hcbc hcca hccb hccc hcch hcfa hcfc hchi hfba hhaa hhhh hhof hi-c hiaa hiab hiba hibi hicc hich hico hifa hiff hifh hifi hifo hihc hihi hiho hiob hioc hoac hoai hoba hobo hoca hoch hoff hoha hoho hoif hoof iaaa iaac iaai iaba iaca iacc iafc iaff iahc iaia ibac ibca ibfi ibia icaa icab icac icaf icai icao icbc icca iccb iccc iccf icci icco icfb ichc ichi icho icoc ifaa ifac ifao ifbb ifco ific ihab ihba ihcc ihob iiac iica iifa iiii iiio iioi iioo ioba iobi ioci iofc ioii ioio ioof iooi iooo oafc oafo oaic obai obba obbo obia oboi ocab ocac ocbc occa occc occi ocfa ocha ochi ofah off- offa offc offh offo ohai ohba ohcc ohhi ohho ohia ohif ohio ohob ohoh oiba oici oiii ooaa ooba oobi ooff ooha ooho ooia oooh oooo