a-ii aaaa aaab aaaf aaai aaba aabb aabi aabt aafa aafb aaff aafi aaib aaii aata aatf aatt abaa abab abaf abag abai abat abb- abba abbb abbi abbt abff abia abib abig abit abta afaa afat affa affi afft afgf afia afib afif afig afit afta agag agai agat agba agfa agga aggi agia agib agig agii agit agta aiai aiba aiff aiga aiia aiib aita aitf aiti aitt at-t ataa atab atai atat atfb atia atif atit atta atti ba-i baaa baaf baat baba babb babi baff baft baga bagg bagi bagt baia baib baig bait bata batf bati batt bbbb bbga bfgf bfta bftt bgia biaf biat biba bibb bibi bifa biff bifi biga bigb bigg bigt bita bitt btaa btaf bttb faaa faba fabi fafa faff fafg fafi fagg fagi fait fata fatf fati fatt ffff ffii fftf fiaa fiaf fiat fiba fifa fiff fifi fift figa figg fiii fita fiti fitt ftii gaba gabb gabi gabt gafa gafb gaff gafi gaft gaga gagg gagi gaia gaig gait gata gati gatt gbag gffa ggbt ggfg gggg giaa giai giat giba gibb giff gift giga gigg gigi gita gtaa gtta iaaa iaai iaat iaba iaff iaia iata iati ibat ibfi ibga ibia ibtb ifaa ifat ifbb ifit ifta igba igfa igga igia iifa iiii iiit iita iitt itaa itaf itai itat itfa itia itif itta ittf taa- taaf taag taat taba tabb tabi tafa taff tafi taft taga tagg tagi taia taig tait tata tatb tati tatt tbaf tbit tbta tgfa tgif tiaa tiab tiaf tiba tibi tifa tiff tift tiga tigi tiit tita titi titt ttab ttbb ttfa ttff tttt