c-- ccc ccd cck ccp ccr cdc cdd cdk cdp cdr ckc ckd cpc cpd cpk cpp cpr crc crd crk crp crr dcc dcd dck dcp dcr ddc ddd ddk ddp ddr dkc dkk dkp dkr dpc dpd dpk dpp dpr drc drd drk drp drr kcc kcd kck kcp kcr kdc kdk kdp kdr kkc kkk kkp kkr kpc kpd kpk kpp kpr krc krd krk krp krr p-p pcc pcd pck pcp pcr pdc pdd pdk pdp pdr pkc pkd pkp pkr ppc ppd ppk ppp ppr prc prd prk prp prr rcc rcd rcp rcr rdc rdd rdp rdr rkc rkk rkp rpc rpd rpk rpp rpr rrc rrd rrk rrp rrr