c-- ccc cce cch ccn ccp ce- cec cee ceh cen cep ch- chc che chh chn chp cn- cnc cne cnh cnn cnp cpc cpe cph cpn cpp ec- ecc ece ech ecn eec eee een eep ehc ehe ehh ehn ehp en- enc ene enh enn enp ep- epc epe eph epn epp hcc hce hch hcn hcp he- hec hee heh hen hep hhc hhe hhh hhn hhp hnc hne hnh hnn hpc hpe hph hpn hpp ncc nce nch ncn ncp ne- nec nee neh nen nep nhc nhe nhh nhn nhp nnc nne nnh nnn nnp npc npe nph npn npp p-p pcc pce pch pcn pcp pec pee peh pen pep phc phe phn php pn- pnc pne pnh pnn pnp ppc ppe pph ppn ppp