a-ii aaaa aaab aaaf aaai aaba aabb aabi aabt aafa aafb aaff aafi aaib aaii aaoo aata aatf aatt abaa abab abaf abai abat abb- abba abbb abbi abbo abbt abff abia abib abit aboa abob abof aboo abot abta afaa afao afat affa affi affo afft afia afib afif afit afoa afoo afta aiai aiba aibo aiff aiia aiib aioi aita aitf aiti aitt aoba aotf at-t ataa atab atai atat atfb atia atif atit atob atof atoi atot atta atti atto ba-i baaa baaf baat baba babb babi babo baff bafo baft baia baib baio bait bata batf bati bato batt bbbb bfta bftt biaf biao biat biba bibb bibi bibo bifa biff bifi bio- bioi biot bita bito bitt boab boai boat boba bobb bobi bobo bofa boff boi- boii boit boob boof boot bota botb boti boto bott btaa btaf btob bttb faaa faba fabi fabo fafa faff fafi fafo faio fait fata fatf fati fato fatt ffff ffii fftf fiaa fiaf fiat fiba fifa fiff fifi fifo fift fiii fita fiti fitt foaf foba fobt fofo foia foof foot fota foti foto fott ftii iaaa iaai iaat iaba iaff iaia iata iati ibat ibfi ibia ibot ibtb ifaa ifao ifat ifbb ifit ifta ifto iifa iiii iiio iiit iioi iioo iita iitt ioba iobi ioii ioio ioit ioof iooi iooo iota iotf ioto itaa itaf itai itat itfa itia itif itof itoi itoo itta ittf itto oafo obai obba obbo obia obit oboi obot off- offa offo ofit ofta oiba oiii oita oiti ooaa ooba oobi ooff ooia oooo ootb otif otit oto- otof otoo otta otti otto taa- taaf taat taba tabb tabi tabo tafa taff tafi tafo taft taia taio tait taoa tata tatb tati tato tatt tbaf tbit tbta tfot tiaa tiab tiaf tiao tiba tibi tifa tiff tifo tift tiit tita titi tito titt toab toat toba tobi tobo tobt tofa toff tofi tofo toft toit tooa toof toot tota toti toto tott ttab ttbb ttfa ttff tttt