a-be aaaa aaab aaad aaae aaaf aaam aaar aaba aabb aabd aabm aada aade aaea aaem aafa aafb aafd aaff aama aamb aamd aame aamr aara aard aare aarm abaa abab abad abae abaf abam abar abb- abba abbb abbe abbr abda abed abee aber abff abma abmb abra adaa adab adad adae adam adar adba adda addd adde addr adea adeb adee adem ader adfa adma admb adme admr adra adre aeaf aede aeer aer- aera aerd afaa afad afam afar afdb afee afer affa afma afr- afra afre afrm amaa amad amae amam amar amb- amba ambe ambr amda amed amee amer amfm amfr amm- amma amme amra arab arad arae araf aram arar arba arbe arda arde ardf ardm area ared aree aref arem arfa arfb arff arma armd arme armm arr- arra arre arrr baaa baad baaf baam baar baba babb babe babm babr bada badb badd bade badr baed baer baff bama bamb bame bamf bamm bar- bara barb bard bare barf barm barr bbad bbbb bbdd bbeb bd-r bdrm bead beaf beam bear beba bebb bebe beda bede beeb beed beef beem beer befa befe beff bema beme bera berd bere berm berr bfme bmaa bmdb brab brad brae braf bram brda brdm brea breb bred bree bref brem brer brfm brrm brrr daab daad daae daam daar daba dabb dada dade daeb daem daer dafa dafe daff dama damb dame damm dara darb dard dare darf darr dbar dddd ddre dead deae deaf dear deba debe deda dedd dede deeb deed deef deem deer defe deff dem- dema demb demd deme der- dera derb dere derf derm derr dfaf dfer dffa dfma dfrf dmaa dmab dmae dmba dmbf dmea dmfa dmrb draa drab drad draf dram drar drba drda drea dred dree dref drem drra eaaf eaba eada eadb eadd eafb eama eame eara earb eard eare ebam ebba ebbr ebed eber edad edam edar edda edde eddm ede- edea edem eder edfa edma edme edra edrm eede eeea eeee eefa eefe eera efab efbr efda effa efma efmd emad emae emam emar emba embd embe embr emer emma emme emra emre erad eraf eram erba erbb erbe erda erde erdf ereb ered erem erer erma erme erra erre faaa faad faam faba fabd fabe fabm fada fadd fade faeb faem fafa fafe faff fama fame fara farb fard fare farm farr fbar fead feaf feam fear feba feda fede feeb feed feem feer fefe feff fema femb feme femm fera ferb ferd fere ferm ferr ffar ffee ffff ffrr fmea frab frad frae fram frea fred free frem maaa maad maaf maam maar maba mabe mada madb madd made maee maem maer mafa mafb maff mama mame mamf mar- mara mard mare marf marm marr mbam mbba mbda mbdb mbed mdbf mddm mdea mdef mdma mdme mdmf mdra mead mear mebe meda medb medd mede meed meef meem meer mefe meff mema meme memr mer- mera merb merd mere merf merm mfbm mffa mmaa mmab mmar mmda mmdb mmdf mmea mmfd mmff mmmd mmmm mmrf mrad mrbb mrbm mrda mrdd mreb mred mree mrmd raab raad raaf raam raba rabb rabe rada radd rade radm radr raed raef raer rafa rafe raff rama ramb rame ramm rara rarb rare rarf rbaf rbbb rbbr rdbm rder rdfa rdma rea- read reae reaf ream rear reba rebb rebe reda redd rede redr reeb reed reef reem refd refe reff refr rema reme rera rerd rere rfae rfam rfef rfem rmaf rrad rred rrrr