c-- ccc ccd ccm ccr ccs cdc cdd cdm cdr cds cmc cmd cmm cmr cms crc crd crm crr crs csc csd csm csr css dcc dcd dcm dcr dcs ddc ddd ddm ddr dds dmc dmd dmm dmr dms drc drd drm drr drs dsc dsd dsm dsr dss m-r mc- mcc mcd mcm mcr mcs mdc mdd mdm mdr mds mmc mmd mmm mmr mms mrc mrd mrm mrr mrs msc msd msm msr mss rcc rcd rcm rcr rcs rdc rdd rdm rdr rds rmc rmd rmm rmr rms rrc rrd rrm rrr rrs rsc rsd rsm rsr rss scc scd scm scr scs sdc sdd sdm sdr sds smc smd smm smr sms sr- src srd srm srr srs ss- ssc ssd ssm ssr sss