c-- ccc cce cco ccp ccs ce- cec cee ceo cep ces co- coc coe coo cop cos cpc cpe cpo cpp cps csc cse cso csp css ec- ecc ece eco ecs eec eee eeo eep ees eo- eoc eoe eoo eop eos ep- epc epe epo epp eps es- esc ese eso esp ess oc- occ oco ocp ocs oec oee oeo oep oes oo- ooc ooo oop oos op- opc ope opo opp ops os- osc ose oso osp oss p-p pcc pce pco pcp pcs pec pee peo pep pes poc poe poo pop pos ppc ppe ppo ppp pps ps- psc pse pso psp pss scc sce sco scp scs se- sec see seo sep ses soc soe soo sop sos spc spe spo spp sps ss- ssc sse sso ssp sss