a-ii aaaa aaab aaac aaaf aaai aaba aabb aabc aabi aabt aaca aacb aacc aacf aaci aact aafa aafb aafc aaff aafi aaib aaic aaii aata aatc aatf aatt abaa abab abac abaf abai abat abb- abba abbb abbi abbt abca abcb abcc abcf abci abct abff abia abib abic abit abta ac-t acaa acab acac acai acat acba acca accc accf acci acct acfc acfi acft aci- acia acic acif acta actc actf acti actt afaa afat afca afcb afcc afci affa affc affi afft afia afib afif afit afta aftc aiai aiba aica aicc aicf aiff aiia aiib aiic aita aitf aiti aitt at-t ataa atab atac atai atat atca atcc atcf atfb atfc atia atic atif atit atta atti ba-i baaa baaf baat baba babb babi bac- baca bacc baci bact bafc baff baft baia baib baic bait bata batc batf bati batt bbbb bbci bbfc bcaa bcat bcbc bcca bccc bcci bcfc bcia bcit bctc bfca bfta bftt biaf biat biba bibb bibi bica bicc bici bifa biff bifi bita bitc bitt btaa btaf btcc btfc bttb caaa caab caac caaf caat caba cabf cabi cac- caca cacc caci cafa cafb cafc caff caia caib caic cait cat- cata catb catc catf cati catt cbac cbat cbbc cbca cbcc cbct cbfb cbfc cbia cbit cbta cbtc cbtf ccaa ccab ccac ccaf ccai ccat ccba ccbc ccca cccb cccc cccf ccci ccfa ccfc ccff ccfi ccic ccii cctb cctc cctt cfaa cfab cfac cfbc cfbt cfca cfcb cfcf cffb cfia cfit cfta cftc ciaa ciat ciba cibc cibi cica cicc cici cict cifa ciff ciia ciii ciit cita citb citf citi citt ctab ctba ctbi ctca ctcf ctfc ctia ctic ctta faaa faac faba fabi faca facc fact fafa fafc faff fafi fait fata fatc fatf fati fatt fcab fcat fcba fcca fccf fcic fcii ffcc ffff ffii fftf fiaa fiac fiaf fiat fiba fica ficc fict fifa fifc fiff fifi fift fiii fita fitc fiti fitt ft-c ftfc ftii iaaa iaac iaai iaat iaba iaca iacc iact iafc iaff iaia iata iatc iati ibac ibat ibca ibfi ibia ibtb ibtc icaa icab icac icaf icai icat icbc icca iccb iccc iccf icci icct icfb icta ifaa ifac ifat ifbb ific ifit ifta iiac iica iifa iiii iiit iita iitt itaa itac itaf itai itat itfa itia itic itif itta ittf taa- taaf taat taba tabb tabc tabi taca tacc taci tact tafa tafc taff tafi taft taia tait tata tatb tati tatt tbaf tbca tbcb tbcc tbit tbta tcca tccc tcfc tctc tfca tftc tiaa tiab tiaf tiba tibi tica ticc tifa tiff tift tiit tita titc titi titt ttab ttbb ttfa ttfc ttff tttt