-vac a-ak aaaa aaac aaal aaav aaca aacc aack aacl aacv aaka aala aalc aall aava acaa acac acca accc acla aclc acvv akaa akal akca akka alaa alac alak alal alca alcc alk- alka all- alla alll alva aval avcc avva caaa caac caal cac- caca cacc cack caka cala calc calk call cava ccaa ccac ccca cccc cccl cccv ccla cclc cclv ckac ckck ckcl ckcv ckvl clav cvac cvca cvcc kaaa kaak kaal kacc kacl kacv kaka kakc kakk kala kalc kalk kall kalv kava kavl kavv kcaa kcac kcal kcav kcca kccc kcck kccl kccv kckc kckk kckl kckv kcla kclc kclk kcll kclv kcvk kcvl kcvv kkaa kkac kkal kkck kkcl kkkk kklc kkll kklv kkvv klaa klac klak klal klav klca klcc klck klcl klka klkc klkk klkl klkv klla kllc kllk kllv klvk klvl klvv kvak kval kvcc kvck kvcl kvcv kvkl kvlc kvlv kvvl kvvv laaa laac laak laal laca lacc lack lacl laka lala lall lava lavc lcac lcca lccc lkal llcc lllc llll lvcc vaal vaca vack vaka vala valk vall vava vcal vlcc vvvv