c-cd cccc cccf cccl cccp ccdc ccdf ccdn ccdp ccdr ccfc ccfd ccff ccfl cclc ccnc ccnf ccnp ccnr ccpl ccpn ccpp ccpr ccrc ccrf ccrl ccrp cd-r cddl cddr cdnc cdnf cfcf cfcl cfcn cfdp cffr cfln cfnr cfpl cfpr cfrn cfrp clcd cldc cldr clpp clrd cncp cndd cndp cnrc cnrr cpdl cpff cplc cppd crcc crcr crdc crfc crfl crlf crpc dccc dccl dccp dcfc dcpl dddd ddlc ddrc dfcc dfrf dnrc dpcp dpll dppc drfc fccf fccp fcnl fdlr ffcc ffff ffrr flcl fldr flnc fndd fndn fndr fnlc fp-c fpcc fpdl fplc fprf frcc frcn frcp frfc frpd lccc lcdd lcdp lcdr lcfc lcfr lcpc lcpd lcpl lcrd lcrl ldcf lddp ldpc lfcc lfrd llcc lldc lldp lllc llll lncr lndn lpfp lppl lprp lrdd lrfc lrrc lrrr nccc nccf nccn nccp nccr ncdc ncdn ncdr ncfc nclc ncln nclr ncnc ncnd ncpc ncrc ncrp ndcc ndcp ndnp ndpd ndpr ndrc ndrf nfdc nfff nfld nlcc nlcf nlpc nlrp nnnn nnpr npcc nppc nppd nppl nrdc nrfc nrpc nrpn nrrc nrrd nrrl pccc pccl pcfc pcll pcpn pcpp pcrc pcrd pcrf pcrl pdcp pdlc pdpn pdpr pdrc pfff pffr plcc pldn plff plpp pnld pnln pnnl pnpp ppcc ppcd pppd pppn pppp pprc pprf prcc prcd prcf prcp prfc prlr prnd prnp prpd prrd rccc rcdc rcfc rcnl rcnr rcpd rcrd rdpc rffc rffl rncp rndc rndf rndp rnld rpdp rpfc rppn rrfc rrrr