a-ak aaaa aaac aaae aaca aacc aace aack aaea aaec aage aaka aake acaa acac acae acag acca accc acce ace- acea acec acek acga acke aeac aega aeka agac agag agca agcc agce agea agee agga agge akaa akae akca akee akeg akka caaa caac cac- caca cacc cace cack caec caga cage cagg caka cake ccaa ccac ccag ccca cccc ccee ccga ccgc ceac cec- ceca cece ceec cege ceke cgac cgcc cgcg ckac ckck ckga eaca eacc eaec eaga eage ecaa ecac ecca eccc ecce ecka eeca eeea eeee eega eeka eeke egaa egae egcc egcg egea egec egee egge eka- ekek ekka gace gack gaea gaec gaga gage gagg gc-c gcaa gccc geca gece geck geek gege gegg gggg kaaa kaag kaak kacc kace kag- kaga kagc kage kagg kaka kakc kake kakk kcaa kcac kcca kccc kcck kcea kcec kcee kceg kcgc kckc kckk kea- keag keak keca kecg keck keek kega kege kegg kegk keka kekc keke kgac kgak kgcc kgce kgec kgga kggg kkaa kkac kkag kkck kkea kkeg kkkk