c-cd cccc cccs ccdc ccdr ccds ccoc ccod ccrc ccrs ccrt ccsd ccss ccst cctc cctt cd-r cdcs cddr cdos cdot cdrs cdss coco coct codd cods cood coos coot cor- corc cord coro corr cors cort cosc coso coss cost cotc coto cots cott crcc crcr crdc croc crod croo cror crot crrt crss crst crtc crts cscc cscd csco cscr cscs csdr csor csos csot csrc csrd csrs cssd cssr cstc cstd csto cstr csts ctor ctos ctot ctrc ctrs ctsc ctss ctts dccc dccs dcct dcds dcos dcsc dcss dctc dcts dddd ddoc ddot ddrc ddss ddts doco docs doct dod- dodd dodo dods dood door doos doot dorc dord doro dorr dors dort doso doss dost dotd doto dots dott drod drot drrs dscc dscr dscs dsdr dsos dsrc dsrr dssc dsst dstc dsto dsts dtcc dtor dtot dtss occc occt ocds ocos ocro ocrr ocrs oct- octo octs oddd odds odoo odor odos odot odso odts oocr oooo ooos oord oort oost oots orco orcs ordo ords oro- oror oros orot orro orrs orso ortc orto orts oscc osco osoo osor osos osrd osro ossd osso ostc ostr osts otcd oto- otoo otor otos otro otrs otso otto otts rccc rccs rcdc rcds rcos rcrd rcsc rcsd rcss rctc rcts rdoc rdos rdso rocc roco rocs rodd rodo rods rood roor roos root rorc roro rort rosc roso ross rost rotc roto rotr rots rott rrrr rscc rscs rsdd rsds rsos rsts rtcc rtdt rtss rtts s-os sccc sccs scct scdc scds scoo scor scot scr- scrc scrs scsc scsd scso scsr scst sctc sctd scto sctr scts sdcc sdco sddc sdds sdot sdrc sdrs sdsc sdss soco socr socs sodd sodo sods sood soor soos soot sord soro sorr sors sort soso soss sost sotc soto sots srcc srct sros srsd srtr sscc sscs ssdc ssdd ssoc ssot ssrc ssrs sssc ssss sstc sstd ssts stcc stcs stds stod stoo stor stos stot strc strd stro strs stss sttc sttd sttr tccc tcdd tcos tctc tcts tdor tdss toco todd todo tods todt tood toor toos toot torc tord toro torr tors tort tosc toso toss tost totc totd toto totr tots tott trcc troc trod troo tros trot trsd trst trtc trtr tscc tsos tssr tsst tstc tsts ttss tttt