c-- ccc cce ccn cco ccp ccv ce- cec cee cen ceo cep cev cn- cnc cne cnn cno cnp cnv co- coc coe con coo cop cov cpc cpe cpn cpo cpp cpv cvc cve cvn cvo cvp cvv ec- ecc ece ecn eco ecv eec eee een eeo eep eev en- enc ene enn eno enp env eo- eoc eoe eon eoo eop ep- epc epe epn epo epp evc eve evn evo evp evv ncc nce ncn nco ncp ncv ne- nec nee nen neo nep nev nnc nne nnn nno nnp nnv no- noc noe non noo nop nov npc npe npn npo npp npv nvc nve nvn nvp nvv oc- occ ocn oco ocp ocv oec oee oen oeo oep on- onc one onn ono onp oo- ooc oon ooo oop oov op- opc ope opn opo opp opv ov- ovc ove ovo ovp ovv p-p pcc pce pcn pco pcp pcv pec pee pen peo pep pev pn- pnc pne pnn pno pnp pnv poc poe pon poo pop pov ppc ppe ppn ppo ppp ppv pvc pve pvn pvo pvp pvv v-e vcc vce vcn vco vcp vec vee ven veo vep vn- vno vnp vnv voc voe von voo vop vov vpc vpe vpn vpo vpp vvc vvo vvv