c-- ccc ccd cce cck ccp ccs cdc cdd cde cdk cdp cds ce- cec ced cee cek cep ces ckc ckd cks cpc cpd cpe cpk cpp cps csc csd cse csk csp css dcc dcd dce dck dcp dcs ddc ddd dde ddk ddp dds de- dec ded dee dek dep des dkc dke dkk dkp dks dpc dpd dpe dpk dpp dps dsc dsd dse dsk dsp dss ec- ecc ecd ece eck ecs ed- edc edd ede edk edp eds eec eed eee eek eep ees ekc ekd eke ekp eks ep- epc epd epe epp eps es- esc esd ese esk esp ess kcc kcd kce kck kcp kcs kdc kde kdk kdp kds ke- kec ked kee kek kep kes kkc kke kkk kkp kks kpc kpd kpe kpk kpp kps ksc ksd kse ksk ksp kss p-p pcc pcd pce pck pcp pcs pdc pdd pde pdk pdp pds pec ped pee pek pep pes pkc pkd pke pkp pks ppc ppd ppe ppk ppp pps ps- psc psd pse psk psp pss scc scd sce sck scp scs sdc sdd sde sdk sdp sds se- sec sed see sek sep ses sk- skc skd ske skk skp sks spc spd spe spk spp sps ss- ssc ssd sse ssk ssp sss