a-ak aaaa aaac aaae aaaf aaar aaca aacc aace aacf aack aacr aaea aaec aafa aafc aaff aaka aake aara aarc aare acaa acac acae acar acca accc acce accf ace- acea acec acek acer acfc acfe acke acr- acra acrc acre acrr aeac aeaf aeer aeka aer- aera aerc afaa afak afar afca afcc afee afek afer affa affc afka afkr afr- afra afrc afre akaa akae akar akca akee aker akka akr- akra akre arac arae araf arak arar arc- arca arce area arec aree aref arek arfa arfc arff arka arke arr- arra arrc arre arrk arrr caaa caac caaf cac- caca cacc cace cack cacr caec caer cafa cafc cafe caff caka cake cara carc care carf cark carr ccaa ccac ccaf ccar ccca cccc cccf ccee ccfa ccfc ccff ccra ccrc ccre ccrf ceac cear cec- ceca cece ceec cef- cefa cefc ceke cer- cera cerc cere cerf cfaa cfac cfae cfar cfca cfcf cffr cfra cfre ckac ckck cker ckfr ckrc crac craf crar crca crcc crce crcr cre- crea crec cree crfc crkc eaaf eaca eacc eaec eara eare ecaa ecac ecar ecca eccc ecce ecef ecfa ecfc ecfr ecka ecra ecrc ecrf ecrr eeca eeea eeee eefa eefe eeka eeke eera eerc efca effa efke eka- ekek eker ekfc ekka eraf erca ercc erce erec erer erfc erke erra errc erre f--k faaa faac faca facc face fack fafa fafc fafe faff fake fara farc fare fark farr fcar fcca fccf fcra feaf feak fear fece feck feek feer fefc fefe feff feke fera ferc fere ferk ferr ffar ffcc ffee ffff ffrr frac frae frak frcc frea free frfc kaaa kaaf kaak kaar kacc kace kaer kafa kafc kafe kaff kafr kaka kakc kake kakk kara kare karf kark karr kcaa kcac kcar kcca kccc kcck kccr kcea kcec kcee kcfa kcfc kckc kckf kckk kckr kcrc kcrr kea- keak kear keca keck kecr keef keek keer kefa kefc keff kefr keka kekc keke ker- kera kerc kere kerf kerk kerr kfac kfar kfcf kfcr kfer kffa kfff kffk kfka kfra kfrc kfre kfrr kkaa kkac kkar kkck kkcr kkea kkfr kkkk kkrc kkre kkrf kkrk kkrr krac krae krak krar krca krcc krce krea krec kree kref krek krfc krfe krff krka krkc krke krkk krkr krrc krre krrf krrk krrr raaf raak rac- raca racc race rack raec raef raer rafa rafc rafe raff raka rake rakk rara rare rarf rark rcac rcaf rccc rcfc rea- reac reae reaf reak rear reca recc rece reck recr reef reek refe reff refr reka reke rera rere rfae rfef rffc rkkf rrfc rrrr