c-cd cccc cccs ccdc ccdr ccds ccrc ccrs ccrt ccsd ccss ccst cctc cctt cd-r cdcs cddr cdrs cdss crcc crcr crdc crrt crss crst crtc crts cscc cscd cscr cscs csdr csrc csrd csrs cssd cssr cstc cstd cstr csts ctrc ctrs ctsc ctss ctts dccc dccs dcct dcds dcsc dcss dctc dcts dddd ddrc ddss ddts drrs dscc dscr dscs dsdr dsrc dsrr dssc dsst dstc dsts dtcc dtss rccc rccs rcdc rcds rcrd rcsc rcsd rcss rctc rcts rrrr rscc rscs rsdd rsds rsts rtcc rtdt rtss rtts sccc sccs scct scdc scds scr- scrc scrs scsc scsd scsr scst sctc sctd sctr scts sdcc sddc sdds sdrc sdrs sdsc sdss srcc srct srsd srtr sscc sscs ssdc ssdd ssrc ssrs sssc ssss sstc sstd ssts stcc stcs stds strc strd strs stss sttc sttd sttr tccc tcdd tctc tcts tdss trcc trsd trst trtc trtr tscc tssr tsst tstc tsts ttss tttt