a-ii aaaa aaab aaac aaai aaba aabb aabc aabi aaca aacb aacc aaci aaib aaic aaii abaa abab abac abai abaj abb- abba abbb abbi abca abcb abcc abci abia abib abic acaa acab acac acai acba acca accc acci aci- acia acic aiai aiba aica aicc aiia aiib aiic aija ajab ajac ajba ba-i baaa baba babb babi bac- baca bacc baci baia baib baic baja baji bbbb bbci bcaa bcbc bcca bccc bcci bcia biaj biba bibb bibi bica bicc bici bija biji bjcc caaa caab caac caba cabi cac- caca cacc caci caia caib caic caja caji cbac cbbc cbca cbcc cbia ccaa ccab ccac ccai ccba ccbc ccca cccb cccc ccci ccic ccii ciaa ciba cibc cibi cica cicc cici ciia ciii cjbc cjca cjcb cjcj cjic iaaa iaac iaai iaba iaca iacc iaia ibac ibca ibia icaa icab icac icai icbc icca iccb iccc icci iiac iica iiii ijji jaba jabi jaca jacc jaci jaja jaji jbaa jcbc jccc jcci jibb jibi jiji jjcc