a-be aaaa aaab aaad aaae aaam aaap aaba aabb aabd aabm aabp aada aade aaea aaem aaep aama aamb aamd aame aamp aapa aapm abaa abab abad abae abam abap abb- abba abbb abbe abda abed abee abma abmb abpa abpd abpm abpp adaa adab adad adae adam adap adba adda addd adde adea adeb adee adem adma admb adme adp- aeap aede amaa amad amae amam amap amb- amba ambe amda amed amee amm- amma amme ampa ampd ampe ampm apam apap apba apda apdd apea aped apem apep apma appa appd baaa baad baam baba babb babe babm bada badb badd bade baed bama bamb bame bamm bamp bapa bape bapp bbad bbbb bbdd bbeb bead beam beap beba bebb bebe beda bede beeb beed beem beep bema beme bmaa bmdb bmdp bmep bpda bpea daab daad daae daam daap daba dabb dabp dada dade daeb daem dama damb dame damm damp dapa dape dapp dbpd dddd dead deae deap deba debe deda dedd dede deeb deed deem deep dem- dema demb demd deme depa depe depp dmaa dmab dmae dmap dmba dmea dmpa dpaa dpma dppa eaba eada eadb eadd eadp eama eame eapp ebam ebba ebed edad edam edda edde eddm eddp ede- edea edem edma edme eede eeea eeee emad emae emam emba embd embe emma emme empa empd empe epaa epad epam epbm epee epmd eppa eppp maaa maad maam maap maba mabe mada madb madd made maee maem mama mame mamp mapa mape mapp mbam mbba mbda mbdb mbed mddm mdea mdma mdme mdmp mdpp mead meap mebe meda medb medd mede meed meem meep mema meme mepe mmaa mmab mmap mmda mmdb mmea mmmd mmmm mmpa mpaa mppe mppp paap paba pada padd pade paea paep pam- pama pamb pame pamm pamp papa papb pape papp pbed pbpa pdea pdma pdpa peab peap peba ped- peda pede peed peep pepa pepd pepe pmaa pmed pmma pmmp pmpm ppad ppap pppa pppd pppp