a-be a-ii aaaa aaab aaac aaae aaai aaba aabb aabc aabi aaca aacb aacc aace aaci aaea aaec aage aaib aaic aaii abaa abab abac abae abag abai abb- abba abbb abbe abbi abca abcb abcc abci abec abee abia abib abic abie abig acaa acab acac acae acag acai acba acca accc acce acci ace- acea acec acga acgi aci- acia acic acie aeac aebi aecb aeci aega agac agag agai agba agca agcc agce agea agee agei agga agge aggi agia agib agic agie agig agii aiai aiba aica aicc aice aiea aiee aiga aiia aiib aiic ba-i baaa baba babb babe babi bac- baca bacc bace baci baga bage bagg bagi baia baib baic baie baig bbbb bbci bbeb bbga bcaa bcbc bcbg bcca bccc bcci bcec bcia bcie beag beba bebb bebe bebi beca beci beeb beeg bega begg begi beia beic bgca bgia biba bibb bibe bibi bica bicc bice bicg bici bieb biga bigb bigc bige bigg caaa caab caac caba cabe cabg cabi cac- caca cacc cace caci caec caei caga cage cagg cagi caia caib caic cbac cbbc cbca cbcc cbce cbea cbec cbee cbga cbgb cbia ccaa ccab ccac ccag ccai ccba ccbc ccca cccb cccc ccci ccee ccga ccgc ccic ccii ceac ceba cec- ceca cece ceci ceeb ceec cege cgac cgcc cgcg ciaa ciba cibc cibe cibi cica cicc cici ciee ciga cigi ciia ciii eaba eaca eacc eaec eaga eage ebac ebba ebbc ebcc ebic ecaa ecac ecai ecbc ecbe ecca eccb eccc ecce ecci ecib ecig eeca eeea eeee eega egaa egae egba egbe egcc egcg egea egec egee eggb egge eggi eica eiec eiei eige eigg gaba gabb gabe gabi gace gaea gaec gaga gage gagg gagi gaia gaie gaig gbag gc-c gcaa gcbc gccc gcic gcii geab geai geba gebe gebi geca gece gege gegg geia geic geie geig gggg giaa giac giai giba gibb gibe gica giga gige gigg gigi i-be iaaa iaac iaai iaba iaca iacc iaea iaec iaia ibac ibca ibea ibec ibeg ibga ibge ibia ibie icaa icab icac icag icai icbc icca iccb iccc icci icea icec icee icga icgc ieac iecc ieie igac igba igbc igcc igea igga igia iiac iica iiie iiii