-er c-- ccc ccd cce ccm ccr ccs cdc cdd cde cdm cdr cds ce- cec ced cee cem cer ces cmc cmd cme cmm cmr cms crc crd cre crm crr crs csc csd cse csm csr css dcc dcd dce dcm dcr dcs ddc ddd dde ddm ddr dds de- dec ded dee dem der des dmc dmd dme dmm dmr dms drc drd dre drm drr drs dsc dsd dse dsm dsr dss ec- ecc ecd ece ecm ecr ecs ed- edc edd ede edm edr eds eec eed eee eem eer ees em- emc emd eme emm emr ems erc erd ere erm err ers es- esc esd ese esm esr ess m-r mc- mcc mcd mce mcm mcr mcs mdc mdd mde mdm mdr mds mec med mee mem mer mes mmc mmd mme mmm mmr mms mrc mrd mre mrm mrr mrs msc msd mse msm msr mss rcc rcd rce rcm rcr rcs rdc rdd rde rdm rdr rds re- rec red ree rem rer res rmc rmd rme rmm rmr rms rrc rrd rrm rrr rrs rsc rsd rse rsm rsr rss scc scd sce scm scr scs sdc sdd sde sdm sdr sds se- sec sed see sem ser ses smc smd sme smm smr sms sr- src srd sre srm srr srs ss- ssc ssd sse ssm ssr sss