-ana a-ii aaaa aaab aaac aaai aaan aaba aabb aabc aabi aaca aacb aacc aaci aacn aaib aaic aaii aain aana aani abaa abab abac abai aban abb- abba abbb abbi abca abcb abcc abci abcn abia abib abic abin acaa acab acac acai acan acba acca accc acci aci- acia acic acin aiai aian aiba aibn aica aicc aiia aiib aiic aiin aina ainc aini ana- anaa anab anac anai anan anba anbb anbi anca ancc ania anib anic anin anna annb anni ba-i baaa baan baba babb babi bac- baca bacc baci bacn baia baib baic bain bana banc bani bann bbbb bbci bbin bcaa bcbc bcca bccc bcci bcia bian biba bibb bibi bica bicc bici biin bin- bina binc bini binn bnai bnib bnin caaa caab caac caan caba cabi cac- caca cacc caci caia caib caic cain cana canc cani cann cbac cbbc cbca cbcc cbcn cbia cbna ccaa ccab ccac ccai ccba ccbc ccbn ccca cccb cccc ccci ccic ccii ccna ccnb ccnc ccni ciaa cian ciba cibc cibi cica cicc cici ciia ciii cin- cina cinc cini cnaa cnac cnbc cnci cnib cnic cnna iaaa iaac iaai iaba iaca iacc iaia iain iana ibac iban ibca ibia icaa icab icac icai ican icbc icca iccb iccc icci iccn icnb icnc iiac iica iiii inab inac inai inan inba inca incb inci inia inna inni n-ii naaa naab naac naai naan naba nabc nabi naca nacc naci naia naib naic nain nan- nana nanb nani nann nbaa nbbc nbca nbcc nbci nbia nbic ncaa ncac ncba ncbc ncbi ncca nccc ncci nccn ncia ncna ncnc niab niac nian nibi nica nicc nici niia nina nini nnnn