c-- ccc cce cco ccp ccv ce- cec cee ceo cep cev co- coc coe coo cop cov cpc cpe cpo cpp cpv cvc cve cvo cvp cvv ec- ecc ece eco ecv eec eee eeo eep eev eo- eoc eoe eoo eop ep- epc epe epo epp evc eve evo evp evv oc- occ oco ocp ocv oec oee oeo oep oo- ooc ooo oop oov op- opc ope opo opp opv ov- ovc ove ovo ovp ovv p-p pcc pce pco pcp pcv pec pee peo pep pev poc poe poo pop pov ppc ppe ppo ppp ppv pvc pve pvo pvp pvv v-e vcc vce vco vcp vec vee veo vep voc voe voo vop vov vpc vpe vpo vpp vvc vvo vvv