a-be a-ii aaaa aaab aaae aaai aaap aaba aabb aabi aabp aabt aaea aaep aaib aaii aapa aapi aapt aata aatt abaa abab abae abai abap abat abb- abba abbb abbe abbi abbt abee abet abia abib abie abit abpa abpi abpp abta aeap aebi aeit aeta aett aiai aiba aiea aiee aiet aiia aiib aipa aipe aipi aita aite aiti aitt apai apap apat apba apea apep apet api- apia apie apip apit appa appt apta apte apti aptt at-t ataa atab atae atai atap atat atea atee atei atep atia atie atip atit atta atte atti attp ba-i baaa baat baba babb babe babi baia baib baie bait bapa bape bapi bapp bapt bata bate bati batt bbbb bbeb bbet beap beat beba bebb bebe bebi beeb beep beet beia beit beta bete beti bett biap biat biba bibb bibe bibi bieb biet bipa bipp bita bite bitt bpai bpea bpti btaa btbp btie bttb eaba eapp eata eate eati ebba ebit eeea eeee eeta eete eiei eita eitb eiti epaa epee epi- epia epie epip epit eppa eppp epta epte etai etap etat etee etta ette etti i-be iaaa iaai iaap iaat iaba iaea iaep iaia iapa iapp iapt iata iate iati ibat ibea ibet ibia ibie ibtb ieat ieet ieie iepa ieta iett iiie iiii iiit iipa iita iitt ipat ipba ipea ipet ipie ippa ipta itaa itai itap itat itbe itea itep itet itia itie itpa itta paap paat paba pabt paea paep paia paib paie paip pait papa papb pape papi papp pata pate pati patt pbpa peab peai peap peat peba peep peet peia peip peit pepa pepe pepi peta pete peti pett piai piat pibb pibi piea piep piet piia piip pipa pipe pipi pipp pita pite piti pitt ppap ppib ppie pppa pppp ppta pptt ptab taa- taat taba tabb tabe tabi taia taip tait tapa tape tapi tapp tapt tata tatb tate tati tatt tbit tbta tbtp teat teba teet teia teie teip tepa tepe tepi tepp teta tete teti tett tiaa tiab tiba tibi tie- tiea tiee tiei tiep tiet tiit tip- tipa tipe tipi tipp tipt tita tite titi titp titt tpap tpia tppa tppp tpte tptp ttab ttbb tttt