c-- ccc ccd cce ccn ccp ccs cdc cdd cde cdn cdp cds ce- cec ced cee cen cep ces cn- cnc cnd cne cnn cnp cns cpc cpd cpe cpn cpp cps csc csd cse csn csp css dcc dcd dce dcn dcp dcs ddc ddd dde ddn ddp dds de- dec ded dee den dep des dnc dnd dne dnn dnp dns dpc dpd dpe dpn dpp dps dsc dsd dse dsn dsp dss ec- ecc ecd ece ecn ecs ed- edc edd ede edn edp eds eec eed eee een eep ees en- enc end ene enn enp ens ep- epc epd epe epn epp eps es- esc esd ese esn esp ess ncc ncd nce ncn ncp ncs ndc ndd nde ndn ndp nds ne- nec ned nee nen nep nes nnc nne nnn nnp nns npc npd npe npn npp nps nsc nsd nse nsn nsp nss p-p pcc pcd pce pcn pcp pcs pdc pdd pde pdn pdp pds pec ped pee pen pep pes pn- pnc pnd pne pnn pnp pns ppc ppd ppe ppn ppp pps ps- psc psd pse psn psp pss scc scd sce scn scp scs sdc sdd sde sdn sdp sds se- sec sed see sen sep ses snc snd sne snn snp sns spc spd spe spn spp sps ss- ssc ssd sse ssn ssp sss