-er c-- ccc ccd cce ccm cco ccr ccu cdc cdd cde cdm cdo cdr cdu ce- cec ced cee cem ceo cer ceu cmc cmd cme cmm cmo cmr cmu co- coc cod coe com coo cor cou crc crd cre crm cro crr cru cuc cud cue cum cuo cur cuu dcc dcd dce dcm dco dcr dcu ddc ddd dde ddm ddo ddr ddu de- dec ded dee dem deo der deu dmc dmd dme dmm dmo dmr dmu doc dod doe dom doo dor dou drc drd dre drm dro drr dru duc dud due dum duo dur ec- ecc ecd ece ecm eco ecr ecu ed- edc edd ede edm edo edr edu eec eed eee eem eeo eer em- emc emd eme emm emo emr emu eo- eoc eod eoe eom eoo eor eou erc erd ere erm ero err eru eu- euc eud eue eur m-o m-r mc- mcc mcd mce mcm mco mcr mcu mdc mdd mde mdm mdo mdr mdu mec med mee mem meo mer meu mmc mmd mme mmm mmo mmr mmu moc mod moe mom moo mor mou mrc mrd mre mrm mro mrr mru muc mud mue mum mur muu oc- occ ocd ocm oco ocr ocu odc odd ode odm odo odr odu oec oed oee oem oeo oer om- omc omd ome omm omo omr omu oo- ooc ood oom ooo oor or- orc ord ore orm oro orr oru ou- ouc oud oue oum ouo our rcc rcd rce rcm rco rcr rcu rdc rdd rde rdm rdo rdr rdu re- rec red ree rem reo rer reu rmc rmd rme rmm rmo rmr roc rod roe rom roo ror rou rrc rrd rrm rrr rru ruc rud rue rum ruo rur ruu ucc ucd uce ucm uco ucr ucu udc udd ude udm udo udr udu uec ued uee uem uer um- umc umd ume umm umo umr umu uoc uod uoe uom uoo uor ur- urc urd ure urm uro urr uru uuc uue uum uur uuu