a-ak aaaa aaac aaae aaar aaca aacc aace aack aacr aaea aaec aage aaka aake aara aarc aare acaa acac acae acag acar acca accc acce ace- acea acec acek acer acga acgr acke acr- acra acrc acre acrr aeac aeer aega aeka aer- aera aerc agac agag agar agca agcc agce agea agee ager agga agge agra agre akaa akae akar akca akee akeg aker akka akr- akra akre arac arae arag arak arar arc- arca arce area arec aree areg arek arga arge arka arke arr- arra arrc arre arrg arrk arrr caaa caac cac- caca cacc cace cack cacr caec caer caga cage cagg cagr caka cake cara carc care cark carr ccaa ccac ccag ccar ccca cccc ccee ccga ccgc ccra ccrc ccre ccrg ceac cear cec- ceca cece ceec cege ceke cer- cera cerc cere cgac cgcc cgcg cger ckac ckck cker ckga ckrc crac crag crar crca crcc crce crcr cre- crea crec cree creg crkc eaca eacc eaec eaga eage eara eare ecaa ecac ecar ecca eccc ecce ecka ecra ecrc ecrr eeca eeea eeee eega eeka eeke eera eerc eerg egaa egae egar egcc egcg egcr egea egec egee eger egge egra egre eka- ekek eker ekka erca ercc erce erec erer erg- erga ergg erke erra errc erre gaar gace gack gaea gaec gaer gaga gage gagg gara gare garg garr gc-c gcaa gccc gcrg gear geca gece geck geek geer gege gegg gera gere gggg grac grae grcc grce grea grec gree greg grrr kaaa kaag kaak kaar kacc kace kaer kag- kaga kagc kage kagg kagr kaka kakc kake kakk kara kare karg kark karr kcaa kcac kcar kcca kccc kcck kccr kcea kcec kcee kceg kcgc kcgr kckc kckk kckr kcrc kcrg kcrr kea- keag keak kear keca kecg keck kecr keek keer kega kege kegg kegk kegr keka kekc keke ker- kera kerc kere kerk kerr kgac kgak kgcc kgce kgcr kgec kgga kggg kggr kgra kgrc kgre kgrg kgrk kgrr kkaa kkac kkag kkar kkck kkcr kkea kkeg kkgr kkkk kkrc kkre kkrk kkrr krac krae krag krak krar krca krcc krce krcg krea krec kree krek krka krkc krke krkk krkr krrc krre krrg krrk krrr raag raak rac- raca racc race rack raec raeg raer raga rage ragg raka rake rakk rara rare rark rcac rccc rcga rcgc rcrg rea- reac reae reak rear reca recc rece reck recr reek rega rege regr reka reke rera rere rerg rrrr