c-- ccc ccd cce ccp ccs cdc cdd cde cdp cds ce- cec ced cee cep ces cpc cpd cpe cpp cps csc csd cse csp css dcc dcd dce dcp dcs ddc ddd dde ddp dds de- dec ded dee dep des dpc dpd dpe dpp dps dsc dsd dse dsp dss ec- ecc ecd ece ecs ed- edc edd ede edp eds eec eed eee eep ees ep- epc epd epe epp eps es- esc esd ese esp ess p-p pcc pcd pce pcp pcs pdc pdd pde pdp pds pec ped pee pep pes ppc ppd ppe ppp pps ps- psc psd pse psp pss scc scd sce scp scs sdc sdd sde sdp sds se- sec sed see sep ses spc spd spe spp sps ss- ssc ssd sse ssp sss