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 alxa axal caaa caac caal cac- caca cacc cack caka cala calc calk call calx caxa ccaa ccac ccca cccc cccl ccla cclc cclx ccxl ckac ckck ckcl ckcx clxx cxxx kaaa kaak kaal kacc kacl kaka kakc kakk kakx kala kalc kalk kall kalx kaxa kaxl kc-x kcaa kcac kcal kcca kccc kcck kccl kckc kckk kckl kckx kcla kclc kclk kcll kclx kcxl kkaa kkac kkal kkck kkcl kkkk kklc kkll kklx kkxa kkxk kkxl kkxx klaa klac klak klal klax klca klcc klck klcl klcx klka klkc klkk klkl klkx klla kllc kllk klxk klxx kxaa kxac kxca kxcl kxkc kxkk kxkx kxla kxlc kxll kxlx kxxk kxxl kxxx laaa laac laak laal laax laca lacc lack lacl laka lala lall laxa lcac lcca lccc lkal llcc lllc llll lxxx xacl xala xall xcal xxxx