c-cd cccc ccci cccp ccdc ccdi ccdp ccdr ccic ccid ccii ccip ccir ccpp ccpr ccrc ccri ccrp cd-r cddr cdic cdii cicc cici cicr cidc cidi cidp cidr ciid ciii cipp circ ciri cirr cpic cppd cpri crcc crcr crdc cric crip crpc cry- cyc- cycc cypc cyy- cyyc dc-y dccc dcci dccp dcii dddd ddrc ddry dici dicy didi didy diii dipc dipp dird dirr diyi dpci dpcp dppc dpyd dric drip dry- dycd dydd dyr- dyrc dyri dyyr iccc icci iccp iccr icdc icdd icdp icpc icpd icrc icrr icry idcr idic idid idir idrc iicd iiii iirc ipcc ipdc ipdi ipid ippc ippr ippy ipri ircc ircd irdc irdp iri- iric irid irip iriy irpc irrc irri pccc pcip pcpp pcrc pcrd pdci pdcp pdic pdpr pdrc picc pici picr picy piip pipi pipp pipy pirc piri pirr piry ppcc ppcd ppci ppic ppid pppd pppp pprc prcc prcd prcp pri- prid prii prpd prrd prri pyic pypy pyr- pyri pyry rccc rcdc rcic rcid rcpd rcpi rcrd rcyc rdpc ricc ridc ridd ridi ripd ripi ripp ripr riri rpdp rpii rpyc rrrr rydy ryip yccc yidi yird yirr ypcc ypir yyyy