-al a-a a-c aaa aac aak aal aax ac- aca acc ack acl acx aka akc akk akl al- ala alc alk all alx ax- axa axk axl axx c-- caa cac cak cal cax cca ccc cck ccl ccx cka ckc ckx cl- cla clc clk cll clx cxc cxk cxl cxx ka- kaa kac kak kal kax kca kcc kck kcl kcx kkc kkk kkl kl- kla klc klx kxl la- laa lac lak lal lax lca lcc lck lcl lcx lka lkl lla llc llk lll lxc lxx xaa xac xak xal xcl xcx xkl xla xxl xxx