a-be a-ii aaaa aaab aaac aaae aaai aaba aabb aabc aabi aaca aacb aacc aace aaci aacu aaea aaec aaib aaic aaii abaa abab abac abae abai abaj abau abb- abba abbb abbe abbi abca abcb abcc abci abec abee abia abib abic abie abiu abua abue acaa acab acac acae acai acba acca accc acce acci accu ace- acea acec aci- acia acic acie acu- acue aeac aebi aecb aeci aiai aiba aica aicc aice aiea aiee aiia aiib aiic aija aiui ajab ajac ajba ajee auaa aube auca auce auci auja ba-i baaa baba babb babe babi babu bac- baca bacc bace baci baia baib baic baie baja baji baju bau- bbau bbbb bbci bbeb bcaa bcbc bcca bccc bcci bcec bcia bcie bcuc beau beba bebb bebe bebi beca beci becu beeb beej beia beic beij beja biaj biba bibb bibe bibi bica bicc bice bici bieb bieu bija biji biju bjcc bjec buba bubb bube bubi bubu buca bucc buce buci bucu buea bueu buic buie buiu buja buje buji buju caaa caab caac caba cabe cabi cabu cac- caca cacc cace caci caec caei caeu caia caib caic caiu caja caji caju cauc cbac cbbc cbca cbcc cbce cbcu cbea cbec cbee cbia ccaa ccab ccac ccai ccba ccbc ccca cccb cccc ccci cccu ccee ccic ccii ccuc ceac ceba cebu cec- ceca cece ceci ceeb ceec ceja cejc ceui ciaa ciau ciba cibc cibe cibi cica cicc cici cicu ciee ciia ciii ciuc cjbc cjca cjcb cjcj cjeu cjic cuau cub- cuba cubb cube cubi cuca cucc cuce cuci cui- cuju eaba eaca eacc eaec eaiu ebac ebba ebbc ebcc ebic ecaa ecac ecai ecbc ecbe ecca eccb eccc ecce ecci ecib ecua eeca eeea eeee eica eiec eiei eija eiji ejji euba eubc eubi i-be iaaa iaac iaai iaba iaca iacc iacu iaea iaec iaia ibac ibca ibea ibec ibia ibie icaa icab icac icai icbc icca iccb iccc icci iccu icea icec icee icub icue ieac iecc ieie iiac iica iiie iiii iiuc ijji ijui iucc iuce iuiu jaba jabi jaca jacc jace jaci jacu jaja jaji jaju jbaa jcbc jccc jcci jebb jebe jeci jeju jibb jibe jibi jije jiji jiju jjcc juab juba jube jubu juca juce jucu juei juia juja juju u-ie uabc uaca uaua ubac ubba ubbe ubbi ubic ubii ubja ucai ucbc ucca ucci ucea ucua ueba uica uuuu