a-ak aaaa aaac aaar aaca aacc aack aacr aaka aara aarc acaa acac acar acca accc acr- acra acrc acrr akaa akar akca akka akr- akra arac arak arar arc- arca arka arr- arra arrc arrk arrr caaa caac cac- caca cacc cack cacr caka cara carc cark carr ccaa ccac ccar ccca cccc ccra ccrc ckac ckck ckrc crac crar crca crcc crcr crkc kaaa kaak kaar kacc kaka kakc kakk kara kark karr kcaa kcac kcar kcca kccc kcck kccr kckc kckk kckr kcrc kcrr kkaa kkac kkar kkck kkcr kkkk kkrc kkrk kkrr krac krak krar krca krcc krka krkc krkk krkr krrc krrk krrr raak rac- raca racc rack raka rakk rara rark rcac rccc rrrr