a-ak aaaa aaac aaal aaca aacc aack aacl aaka aala aalc aall acaa acac acca accc acla aclc akaa akal akca akka alaa alac alak alal alca alcc alk- alka all- alla alll caaa caac caal cac- caca cacc cack caka cala calc calk call ccaa ccac ccca cccc cccl ccla cclc ckac ckck ckcl kaaa kaak kaal kacc kacl kaka kakc kakk kala kalc kalk kall kcaa kcac kcal kcca kccc kcck kccl kckc kckk kckl kcla kclc kclk kcll kkaa kkac kkal kkck kkcl kkkk kklc kkll klaa klac klak klal klca klcc klck klcl klka klkc klkk klkl klla kllc kllk laaa laac laak laal laca lacc lack lacl laka lala lall lcac lcca lccc lkal llcc lllc llll