a-a a-c a-z aaa aac aak aas aaz ac- aca acc ack acs acz aka akc akk aks as- asa asc ask ass asz az- aza azs azz c-- caa cac cak cas caz cca ccc cck ccs ccz cka ckc cks csa csc csk css csz cz- czc czk k-z ka- kaa kac kak kas kaz kca kcc kck kcs kkc kkk kks ksa ksc ksk kss saa sac sak sas saz sca scc sck scs sk- ska skc skk sks ss- ssa ssc ssk sss ssz sza zaa zac zak zas zaz zcs zka zks zsa zsz zzs zzz