c-- ccc cce cco ccs ccv ce- cec cee ceo ces cev co- coc coe coo cos cov csc cse cso css csv cvc cve cvo cvs cvv ec- ecc ece eco ecs ecv eec eee eeo ees eev eo- eoc eoe eoo eos es- esc ese eso ess esv evc eve evo evs evv oc- occ oco ocs ocv oec oee oeo oes oo- ooc ooo oos oov os- osc ose oso oss osv ov- ovc ove ovo ovs ovv scc sce sco scs scv se- sec see seo ses sev soc soe soo sos sov ss- ssc sse sso sss ssv svc sve svo svs svv v-e vcc vce vco vcs vec vee veo ves voc voe voo vos vov vsc vse vso vss vsv vvc vvo vvs vvv