c-cd cccc cccp cccs ccdc ccdp ccdr ccds ccoc ccod ccpp ccpr ccps ccrc ccrp ccrs ccrt ccsd ccsp ccss ccst cctc cctt cd-r cdcs cddr cdos cdot cdps cdrs cdss ckck ckco ckcs ckdo ckoc ckoo ckor ckos ckot ckpc ckpr ckrc ckrd ckso ckst ckts cock coco cocp coct codd cods cok- coko cood cook coop coos coot copd copo copp copr cops copt cor- corc cord cork coro corp corr cors cort cosc coso cosp coss cost cotc coto cots cott cpcs cpos cppd cpps cprs cprt cpsc cpsk cpso cpsr cptp cptr cpts crcc crcr crdc crkc crkp croc crod crok croo crop cror crot crpc crps crrt crsp crss crst crtc crtp crts cscc cscd csco cscr cscs csdp csdr csks csor csos csot cspc cspd csps cspt csrc csrd csrs cssd cssr cstc cstd csto cstr csts ctcp ctor ctos ctot ctpo ctpp ctps ctrc ctrp ctrs ctsc ctss ctts dccc dccp dccs dcct dcds dcop dcos dcpo dcps dcrk dcsc dcss dctc dcts dddd ddoc ddot ddpo ddps ddrc ddss ddts dkdc dock doco docs doct dod- dodd dodo dods doko dood dook doop door doos doot dopo dopp dopr dops dopt dorc dord dork doro dorp dorr dors dort dosk doso doss dost dotd dotk doto dots dott dpcp dpdt dpos dppc dprk dpsd dpst dpts drod drop drot drrs drsp dscc dscp dscr dscs dsdp dsdr dsos dsps dspt dsrc dsrp dsrr dssc dssp dsst dstc dsto dsts dtcc dtdp dtor dtot dtss dttp k-os kccc kccd kcck kccr kcct kcdc kcdd kcdr kcds kckc kckk kcko kckr kcor kcos kcot kcpc kcpo kcpr kcps kcpt kcrc kcro kcrp kcrr kcrs kcrt kcsc kcsd kcsp kcsr kcss kcst kctc kcto kdcc kdcd kdco kdcr kddc kddd kddk kddr kdkd kdkk kdko kdkr kdkt kdoc kdok kdot kdpr kdps kdro kdrs kdsc kdsd kdsk kdsp kdsr kdss kdst kdtd kdtp kdtr kkcd kkck kkco kkcr kkcs kkct kkdc kkdd kkdo kkdt kkkk kkoo kkor kkot kkpc kkpk kkps kkpt kkrc kkrk kkro kkrr kkrs kkrt kksd kksp kksr kkss kkst kktc kktk kkts kocd kock kocp kocs koct kodk kodo kods kodt kokc kokk koko kokp kokr koks kooc kook kooo koop koor koos koot kopp kopr kops kopt korc kord kork koro korr kors kort kos- kosc kosd koso kosp kosr koss kost kotc kotd kotk koto kotr kots kott kpcc kpcr kpcs kpdc kpdo kpdr kpkk kpkr kpoc kpod kpok kpoo kpop kppc kppd kppk kppo kppp kppr kprc kprd kprk kpro kprp kprr kprs kprt kpsc kpsd kpso kpsp kptd kpto kptr kpts kptt krcc krcd krco krcs krdc krdd krdo krdr krds krkc krkd krkk krko krkr krks kroc krod krok kroo krop kror kros krpr krps krpt krrc krrk krro krrr krrs krrt krsc krsd krsk krsr krss krst krtc krtk krto krtr krts ksck ksco kscr kscs ksdc ksdk ksdp ksdr ksds kskd kskk ksko kskr ksks ksoc ksok ksoo ksop ksor ksos kspc kspd kspk kspo kspr ksps kspt ksro ksrp ksrr ksrs ksrt ksso kssr ksss ksst kstc kstk ksto kstp kstr ksts kstt ktcc ktck ktco ktcr ktcs ktdc ktdd ktdk ktdo ktdr ktkc ktkk ktko ktkr ktks ktkt ktoc ktok ktoo ktop ktor ktot ktpk ktpo ktpr ktpt ktrc ktrk ktro ktrp ktrr ktrs ktrt ktsc ktsd ktso ktsr ktst kttc kttk ktto kttp kttr ktts kttt occc occt ocds ocks ocos ocpd ocpp ocro ocrr ocrs oct- octo octs oddd odds odoo odop odor odos odot odrp odso odts okko okok okor okot okpo okro okso okto oocr oooo ooos oops oord oort oost ootp oots opds opo- opor opos oppo opps opto opts orco orcs ordo ords orko oro- orok oror oros orot orpc orps orro orrs orsk orso ortc orto orts oscc osco osoo osor osos osrd osro ossd osso ostc ostr osts otcd oto- otok otoo otor otos otpp otro otrs otso otto otts pccc pccs pcks pcod pcos pcpp pcps pcrc pcrd pcso pcts pdcp pdoc pdos pdpr pdrc pdrs pdsd pdss pdtc pkcs pkts pocd pock poco pocs pod- podd podo pods poko pood pook poop poor poos poot pop- popc popo popp pops popt porc pork poro porr pors port posk poso poss post potc potd poto pots pott ppcc ppcd ppcs ppdk ppds ppod ppos pppd pppo pppp ppps pprc ppss ppts pptt prcc prcd prcp prcs pro- proc prod proo prop pros prot prpd prps prrd prrs prsc prsd prso prss prtc prtp prtr psco psdc psdp psdr psds psoc psos pspp pspr psps psrd psrk psrp pssc psso psst psts ptcc ptdc ptop ptpd ptrd ptsd pttc pttk rccc rccs rcdc rcds rcos rcpd rcpo rcps rcpt rcrd rcsc rcsd rcss rctc rcts rdoc rdos rdpc rdso rkos rkss rkts rocc rock roco rocs rodd rodo rods rokk roko rokr roks rood rook roop roor roos root ropo rops rorc rork roro rort rosc roso rosp ross rost rotc rotk roto rotr rots rott rpcs rpdp rpos rpps rptd rpts rrrr rrsp rscc rscs rsdd rsds rsos rspk rspo rsps rstp rsts rtcc rtdt rtps rtss rttp rtts s-os sccc sccp sccs scct scdc scdp scds sck- scok scoo scop scor scot scpo scps scpt scr- scrc scrs scsc scsd scso scsr scst sctc sctd scto sctr scts sdcc sdco sddc sdds sdot sdpr sdps sdrc sdrs sdsc sdss skop skor skot skpc skpo skrt sksd skss sock soco socr socs sodd sodo sods sokk soko sood sook soop soor soos soot sopd sopo sopp sops sord soro sorr sors sort soso soss sost sotc sotk soto sotp sots spcc spco spcs spdc spdp spdr spdt spkr spoc spod spok spoo spop spor spos spot sppd spps sprd spro sprs spsd spso spsp spss spst sptc spto sptr spts srcc srct sros srpc srps srpt srsd srsp srtp srtr sscc sscp sscs ssdc ssdd ssdp ssoc ssop ssot sspc sspo ssps sspt ssrc ssrs sssc ssss sstc sstd sstp ssts stcc stcp