a-a a-c aaa aac aak aas aav ac- aca acc ack acs acv aka akc akk aks akv as- asa asc ask ass asv av- ava avc avk avs c-- caa cac cak cas cav cca ccc cck ccs ccv cka ckc cks csa csc csk css csv cva cvc cvk cvs cvv ka- kaa kac kak kas kav kca kcc kck kcs kkc kkk kks kkv ksa ksc ksk kss ksv kva kvk kvs kvv saa sac sak sas sav sca scc sck scs scv sk- ska skc skk sks ss- ssa ssc ssk sss ssv sva svc svk svs svv v-a vaa vac vak vas vav vca vcc vcs vka vsa vsc vsk vss vsv vva vvc vvs vvv