-er -ic c-- ccc ccd cce cci ccm cco ccr ccs cdc cdd cde cdi cdm cdo cdr cds ce- cec ced cee cei cem ceo cer ces ci- cic cid cie cii cim cio cir cis cmc cmd cme cmi cmm cmo cmr cms co- coc cod coe coi com coo cor cos crc crd cre cri crm cro crr crs csc csd cse csi csm cso csr css dcc dcd dce dci dcm dco dcr dcs ddc ddd dde ddi ddm ddo ddr dds de- dec ded dee dei dem deo der des di- dic did die dii dim dio dir dis dmc dmd dme dmi dmm dmo dmr dms doc dod doe doi dom doo dor dos drc drd dre dri drm dro drr drs dsc dsd dse dsi dsm dso dsr dss ec- ecc ecd ece eci ecm eco ecr ecs ed- edc edd ede edi edm edo edr eds eec eed eee eem eeo eer ees eic eid eie eii eim eio eir eis em- emc emd eme emi emm emo emr ems eo- eoc eod eoe eoi eom eoo eor eos erc erd ere eri erm ero err ers es- esc esd ese esi esm eso esr ess i-d icc icd ice ici icm ico icr ics idc idd ide idi idm ido idr ids ie- iec ied iee iei iem ier ies iic iid iie iii iim iio iir iis im- imc imd ime imi imm imo ims io- ioc iod ioe ioi iom ioo ior ios ir- irc ird ire iri irm iro irr irs is- isc isd ise isi ism iso isr iss m-o m-r mc- mcc mcd mce mci mcm mco mcr mcs mdc mdd mde mdi mdm mdo mdr mds mec med mee mei mem meo mer mes mi- mic mid mie mii mim mio mir mis mmc mmd mme mmi mmm mmo mmr mms moc mod moe moi mom moo mor mos mrc mrd mre mri mrm mro mrr mrs msc msd mse msi msm mso msr mss o-i oc- occ ocd oci ocm oco ocr ocs odc odd ode odi odm odo odr ods oec oed oee oei oem oeo oer oes oic oid oie oii oim oio oir ois om- omc omd ome omi omm omo omr oms oo- ooc ood ooi oom ooo oor oos or- orc ord ore ori orm oro orr ors os- osc osd ose osi osm oso osr oss rcc rcd rce rci rcm rco rcr rcs rdc rdd rde rdi rdm rdo rdr rds re- rec red ree rei rem reo rer res ric rid rie rii rim rio rir ris rmc rmd rme rmi rmm rmo rmr rms roc rod roe roi rom roo ror ros rrc rrd rri rrm rrr rrs rsc rsd rse rsi rsm rso rsr rss scc scd sce sci scm sco scr scs sdc sdd sde sdi sdm sdo sdr sds se- sec sed see sei sem seo ser ses sic sid sie sii sim sio sir sis smc smd sme smi smm smo smr sms soc sod soe soi som soo sor sos sr- src srd sre sri srm sro srr srs ss- ssc ssd sse ssi ssm sso ssr sss