a-ha a-ii aaaa aaab aaac aaah aaai aaba aabb aabc aabh aabi aaca aacb aacc aach aaci aaco aaha aaib aaic aaii aaoo abaa abab abac abai abb- abba abbb abbi abbo abca abcb abcc abch abci abha abhi abho abia abib abic aboa abob aboh aboo acaa acab acac acai acba acca accc acch acci acco acha achh achi acho aci- acia acic acoa acoh ahab ahac ahah ahai ahha ahio ahoa aiai aiba aibo aica aicc aich aiha aiho aiia aiib aiic aioc aioi aoah aoba aoca ba-i baaa baah baba babb babi babo bac- baca bacc bach baci baco baha bahi baho baia baib baic baio baoh bbbb bbch bbci bcaa bcbc bcca bccc bcci bcia bhai bhao bhca bhcc bhoi biao biba bibb bibi bibo bica bicc bich bici bico biha bihi bio- bioc bioi boab boac boai boba bobb bobi bobo boca boch boco boha boho boi- boii boob booc booh c-bo caaa caab caac caah caba cabi cabo cac- caca cacc cach caci caco caha caia caib caic caio caoi cbac cbbc cbca cbcc cbha cbia ccaa ccab ccac ccai ccba ccbc ccca cccb cccc ccci ccha ccic ccii ccob ccoc chaa chab chac chah chai chao chca chch chci chha chia chib chic chih choc choh choi choo ciaa ciao ciba cibc cibi cibo cica cicc cich cici cico ciia ciii ciob coai coba cobb cobh cobi cobo coca coch coco coha coho coia coob cooh h-ii haab haba habi habo haco haha haho hbic hbio hboc hcbc hcca hccb hccc hcch hchi hhaa hhhh hi-c hiaa hiab hiba hibi hicc hich hico hihc hihi hiho hiob hioc hoac hoai hoba hobo hoca hoch hoha hoho iaaa iaac iaai iaba iaca iacc iahc iaia ibac ibca ibia icaa icab icac icai icao icbc icca iccb iccc icci icco ichc ichi icho icoc ihab ihba ihcc ihob iiac iica iiii iiio iioi iioo ioba iobi ioci ioii ioio iooi iooo oaic obai obba obbo obia oboi ocab ocac ocbc occa occc occi ocha ochi ohai ohba ohcc ohhi ohho ohia ohio ohob ohoh oiba oici oiii ooaa ooba oobi ooha ooho ooia oooh oooo