c-- ccc ccd cce ccn ccp cdc cdd cde cdn cdp ce- cec ced cee cen cep cn- cnc cnd cne cnn cnp cpc cpd cpe cpn cpp dcc dcd dce dcn dcp ddc ddd dde ddn ddp de- dec ded dee den dep dnc dnd dne dnn dnp dpc dpd dpe dpn dpp ec- ecc ecd ece ecn ed- edc edd ede edn edp eec eed eee een eep en- enc end ene enn enp ep- epc epd epe epn epp ncc ncd nce ncn ncp ndc ndd nde ndn ndp ne- nec ned nee nen nep nnc nne nnn nnp npc npd npe npn npp p-p pcc pcd pce pcn pcp pdc pdd pde pdn pdp pec ped pee pen pep pn- pnc pnd pne pnn pnp ppc ppd ppe ppn ppp