a-ak a-be aaaa aaab aaad aaae aaaf aaba aabb aabd aabt aada aade aadt aaea aafa aafb aafd aaff aage aaka aake aata aatf aatk aatt abaa abab abad abae abaf abag abak abat abb- abba abbb abbe abbt abda abed abee abet abff abgd abta adaa adab adad adae adag adak adat adba adda addd adde adea adeb adee adet adfa adta aeaf aede aedt aega aeka aeta aetf aett afaa afad afak afat afdb afee afek afet affa afft afgf afka afta afte agad agag agat agba agda agde agea aged agee aget agfa agga agge agta agte akaa akae aked akee akeg akka akte at-t ataa atab atad atae atak atat atdt atea ated atee atef atfb atfe atka atkt atta atte baaa baad baaf baak baat baba babb babe bada badb badd bade baed baek baff baft baga bage bagg bagt bak- baka bake bakt bata bate batf batt bbad bbbb bbdd bbeb bbet bbga bead beaf beag beak beat beba bebb bebe beda bede beeb beed beef beeg beek beet befa befe beff beft bega begg beka beke beta bete bett bfgf bfta bftt bkgd btaa btaf btdt btek bttb daab daad daae daag daba dabb dabt dada dade daeb dafa dafe daff daft daga dage dagg daka dake data date datt dbag dbtt dddd dead deae deaf deak deba debe debt deda dedd dede deeb deed deef deeg deek deet defe deff defg deft dega dege dek- deka deke deta dete detk dfaf dfdt dffa dftg dgeg dgge dgka dgkb dgkd dgkg dkba dtaa dted dtek eaaf eaba eada eadb eadd eafb eaga eage eata eate ebba ebed edad edag edda edde ede- edea edfa edge edta eede eeea eeee eefa eefe eega eeka eeke eeta eete ef-g efab efda efet effa efke eft- efta egaa egad egae egat egba egbe egea egee eggb egge egta egte egtk eka- ekab ekeb eked ekek eket ekka ekta etag etak etat etee etfa etfb etfe etka etta ette f--k faaa faad faba fabd fabe fada fadd fade faeb fafa fafe faff fafg fage fagg fake fakt fata fate fatf fatt fead feaf feak feat feba feda fede feeb feed feek feet fefe feff fege fegg feke feta fete fett ffee ffff fftf fkab ftea ftgd gaba gabb gabe gabt gada gadd gade gadk gaea gaed gafa gafb gaff gaft gaga gage gagg gata gate gatt gbag gbde gddb geab gead geat geba gebe geda gedd gede geed geek geet gefe geft gege gegg geta getb gete getg getk gett gffa ggbt ggfg gggg gtaa gtea gtta kaaa kaab kaaf kaag kaak kaat kaba kabb kabd kabe kabf kabg kad- kada kadd kade kadf kadt kaet kafa kafe kaff kag- kaga kagb kage kagg kagt kaka kake kakk kakt kat- kata katb katd kate katf katg katk katt kbaa kbab kbad kbae kbak kbat kbba kbbb kbbd kbbe kbbf kbbg kbbk kbbt kbdb kbde kbdf kbdg kbeb kbed kbee kbef kbek kbet kbfb kbff kbfk kbft kbga kbgb kbge kbgg kbgt kbkb kbkf kbkg kbkk kbta kbtb kbte kbtf kbtk kbtt kdaa kdab kdad kdae kdaf kdag kdak kdat kdbb kdbg kddb kddd kddf kddg kddk kdeb kdef kdet kdft kdge kdka kdkb kdkd kdkk kdkt kdta kdtd kea- kead keag keak keat keba kebb kebe kebt keda kedb kedd kede kedg kedt keed keef keek keet kefa kefb keff keft kega kege kegg kegk keka kekb keke ket- keta ketd kete ketf ketk kett kfab kfat kfbk kfbt kfda kfeb kfed kfeg kffa kffb kfff kffg kffk kfge kfka kfkb kfta kfte kftg kftk kftt kgab kgaf kgak kgba kgbb kgbt kgdb kgdd kgeb kged kget kgfa kgff kgfk kgft kgga kggf kggg kgtf kgtk kkaa kkag kkat kkba kkbb kkbd kkbe kkbg kkbt kkda kkdd kkdg kkdt kkea kked kkeg kkfg kkft kkgb kkkk kktk ktaa ktae ktag ktak ktat ktba ktbb ktbg ktbt ktdb ktdd ktde ktdf ktdk ktea kted ktee kteg ktek ktfb ktga ktge ktgf ktgg ktkb ktke ktkk ktkt kttf kttg kttk kttt taa- taaf taag taat taba tabb tabe tada tade tadg tafa tafe taff taft taga tage tagg taka take takk takt tata tatb tate tatt tbaf tbta tddb tdff tead teak teat teba teda tedd tede tedk teed teef teek teet teff teft tega tegg tegt teka teke teta tete tett tfae tfeb tgfa tkkg ttab ttbb ttfa ttff ttkg tttt