-er c-- ccc ccd cce ccm cco ccp ccr ccs cdc cdd cde cdm cdo cdp cdr cds ce- cec ced cee cem ceo cep cer ces cmc cmd cme cmm cmo cmp cmr cms co- coc cod coe com coo cop cor cos cpc cpd cpe cpm cpo cpp cpr cps crc crd cre crm cro crp crr crs csc csd cse csm cso csp csr css dcc dcd dce dcm dco dcp dcr dcs ddc ddd dde ddm ddo ddp ddr dds de- dec ded dee dem deo dep der des dmc dmd dme dmm dmo dmp dmr dms doc dod doe dom doo dop dor dos dpc dpd dpe dpm dpo dpp dpr dps drc drd dre drm dro drp drr drs dsc dsd dse dsm dso dsp dsr dss ec- ecc ecd ece ecm eco ecr ecs ed- edc edd ede edm edo edp edr eds eec eed eee eem eeo eep eer ees em- emc emd eme emm emo emp emr ems eo- eoc eod eoe eom eoo eop eor eos ep- epc epd epe epm epo epp epr eps erc erd ere erm ero erp err ers es- esc esd ese esm eso esp esr ess m-o m-r mc- mcc mcd mce mcm mco mcp mcr mcs mdc mdd mde mdm mdo mdp mdr mds mec med mee mem meo mep mer mes mmc mmd mme mmm mmo mmp mmr mms moc mod moe mom moo mop mor mos mpc mpd mpe mpm mpo mpp mpr mps mrc mrd mre mrm mro mrp mrr mrs msc msd mse msm mso msp msr mss oc- occ ocd ocm oco ocp ocr ocs odc odd ode odm odo odp odr ods oec oed oee oem oeo oep oer oes om- omc omd ome omm omo omp omr oms oo- ooc ood oom ooo oop oor oos op- opc opd ope opm opo opp opr ops or- orc ord ore orm oro orp orr ors os- osc osd ose osm oso osp osr oss p-p pcc pcd pce pcm pco pcp pcr pcs pdc pdd pde pdm pdo pdp pdr pds pec ped pee pem peo pep per pes pmc pmd pme pmm pmo pmp pmr pms poc pod poe pom poo pop por pos ppc ppd ppe ppm ppo ppp ppr pps prc prd pre prm pro prp prr prs ps- psc psd pse psm pso psp psr pss rcc rcd rce rcm rco rcp rcr rcs rdc rdd rde rdm rdo rdp rdr rds re- rec red ree rem reo rep rer res rmc rmd rme rmm rmo rmp rmr rms roc rod roe rom roo rop ror ros rpc rpd rpe rpm rpo rpp rpr rps rrc rrd rrm rrp rrr rrs rsc rsd rse rsm rso rsp rsr rss scc scd sce scm sco scp scr scs sdc sdd sde sdm sdo sdp sdr sds se- sec sed see sem seo sep ser ses smc smd sme smm smo smp smr sms soc sod soe som soo sop sor sos spc spd spe spm spo spp spr sps sr- src srd sre srm sro srp srr srs ss- ssc ssd sse ssm sso ssp ssr sss