c-- ccc ccd cce cck ccp cdc cdd cde cdk cdp ce- cec ced cee cek cep ckc ckd cpc cpd cpe cpk cpp dcc dcd dce dck dcp ddc ddd dde ddk ddp de- dec ded dee dek dep dkc dke dkk dkp dpc dpd dpe dpk dpp ec- ecc ecd ece eck ed- edc edd ede edk edp eec eed eee eek eep ekc ekd eke ekp ep- epc epd epe epp kcc kcd kce kck kcp kdc kde kdk kdp ke- kec ked kee kek kep kkc kke kkk kkp kpc kpd kpe kpk kpp p-p pcc pcd pce pck pcp pdc pdd pde pdk pdp pec ped pee pek pep pkc pkd pke pkp ppc ppd ppe ppk ppp