-ic a-a a-c a-i aaa aac aai aak aax ac- aca acc aci ack acx ai- aia aic aii aik aix aka akc aki akk ax- axa axi axk axx c-- caa cac cai cak cax cca ccc cci cck ccx ci- cia cic cii cik cix cka ckc cki ckx cxc cxi cxk cxx ia- iaa iac iai ica icc ici ick iia iic iii iix ika ikc iki ikk ikx ixc ixi ka- kaa kac kai kak kax kca kcc kci kck kcx kia kic kii kik kix kkc kki kkk xaa xac xak xci xcx xia xic xii xix xxi xxx