-vac a-ak aaaa aaac aaar aaav aaca aacc aack aacr aacv aaka aara aarc aava acaa acac acar acca accc acr- acra acrc acrr acrv acvv akaa akar akca akka akr- akra arac arak arar arc- arca arka arr- arra arrc arrk arrr arva avar avcc avra avva caaa caac cac- caca cacc cack cacr caka cara carc cark carr cava ccaa ccac ccar ccca cccc cccv ccra ccrc ckac ckck ckcv ckrc crac crar crca crcc crcr crkc cvac cvar cvca cvcc cvra cvrr kaaa kaak kaar kacc kacv kaka kakc kakk kara kark karr karv kava kavv kcaa kcac kcar kcav kcca kccc kcck kccr kccv kckc kckk kckr kckv kcrc kcrr kcrv kcvk kcvr kcvv kkaa kkac kkar kkck kkcr kkkk kkrc kkrk kkrr kkrv kkvr kkvv krac krak krar krav krca krcc krka krkc krkk krkr krkv krrc krrk krrr krva krvc krvk krvr krvv kvak kvar kvcc kvck kvcr kvcv kvra kvrc kvrr kvrv kvvr kvvv raak rac- raca racc rack racv raka rakk rara rark rava rcac rccc rcvr rrrr rv-c rvca vaar vaca vack vaka vara vark varr vava vrac vrak vrav vvvv