a-a a-c aaa aac aae aas aav ac- aca acc ace acs acv aea aec aee aes aev as- asa asc ase ass asv av- ava avc ave avs c-- caa cac cae cas cav cca ccc cce ccs ccv ce- cea cec cee ces cev csa csc cse css csv cva cvc cve cvs cvv eaa eac eae eas eav ec- eca ecc ece ecs ecv eea eec eee ees eev es- esa esc ese ess esv eva evc eve evs evv saa sac sae sas sav sca scc sce scs scv se- sea sec see ses sev ss- ssa ssc sse sss ssv sva svc sve svs svv v-a v-e vaa vac vae vas vav vca vcc vce vcs vea vec vee ves vsa vsc vse vss vsv vva vvc vvs vvv