a-ii aaaa aaab aaad aaai aaas aaba aabb aabd aabi aabt aada aadi aads aadt aaib aaii aais aasa aasd aasi aass aast aata aatt abaa abab abad abai abas abat abb- abba abbb abbi abbs abbt abda abdi abia abib abid abis abit abs- absa absd absi abss abta abts adaa adab adad adai adas adat adba adbi adda addd addi adds adia adib adis adit adsa adsi adss adst adta adts aiai aias aiba aida aidb aidi aids aidt aiia aiib aiid aisa aisb aisd aisi aist aita aiti aits aitt asaa asab asad asai asas asat asba asda asds asia asii asis asit assa assd assi asss asst asta astb asti asts at-t ataa atab atad atai atas atat atbs atdi atdt atia atid atis atit atsb atsi atst atta atti atts ba-i baaa baad baas baat baba babb babi babs bada badb badd badi bads baia baib baid bais bait basa basi bass bast bata bati bats batt bbad bbas bbbb bbbs bbdd bdii bdsd biad bias biat biba bibb bibi bibs bida bidi bids biis bis- bisa bisd biss bist bita bitd bits bitt bsaa bsas bsat bsbd bssd bsts btaa btdt btss bttb daab daad daas daba dabb dabs dabt dada dadi dads daia daid dais dait dasa dasb dasd dasi dass dast data dati dats datt dbas dbit dbsa dbss dbtt dddd ddss ddts dia- diab diad dias diat diba dibb dibs dida didi dids diii diis dis- disa disd disi diss dist dita diti dits ditt dsba dsda dssa dssi dsst dsts dtaa dtss iaaa iaai iaas iaat iaba iadb iadt iaia iais iasa iasi iata iati ibad ibas ibat ibia ibid ibis ibsa ibss ibtb ibts idad idas idat idda idia idid idis idsa idss idta idts iias iida iiii iiis iiit iisd iisi iist iita iitt is-a isad isai isas isat isba isbd isbt isda isdb isds isia isis isit issa issi isss ista istd isti ists itaa itai itas itat itbs itia itis itsa itsi itta s-ib s-ii saab saad saas saat saba sabb sabi sabs sada sadb sadd sadi sads sadt saia said sais sait sasa sasd sasi sass sast sata satb satd sati sats satt sbaa sbai sbas sbbs sbds sbia sbsa sbsd sbsi sbst sdba sdds sdib sdss siaa siab siai sias siat siba sibi sibs sida sidd sidi sids siit sisa sisd sisi siss sist sit- sita sitd siti sits sitt ssaa ssab ssas ssat ssdd ssid ssis ssit sssa sssb sssi ssss ssta sstb sstd ssts stab stad stai stas stat stbd stbs stds stia stib stid stis stit stsi stss sttd taa- taas taat taba tabb tabi tabs tada tads taia tais tait tasa tasb tasi tass tast tata tatb tati tats tatt tbas tbbs tbit tbst tbta tddb tdis tdss tiaa tiab tias tiba tibi tibs tidd tids tiit tisa tisb tisi tiss tist tita titi tits titt tsaa tsai tsat tsbd tsdb tsia tsid tsis tssa tssi tsst tsts ttab ttbb ttss tttt