-er a-a a-c aaa aac aad aae aam aao aar ac- aca acc acd ace acm aco acr ad- ada adc add ade adm ado adr aea aec aed aee aem aeo aer ama amc amd ame amm amo amr aoa aoc aod aoe aom aoo aor ar- ara arc ard are arm aro arr c-- caa cac cad cae cam cao car cca ccc ccd cce ccm cco ccr cda cdc cdd cde cdm cdo cdr ce- cea cec ced cee cem ceo cer cma cmc cmd cme cmm cmo cmr co- coa coc cod coe com coo cor cra crc crd cre crm cro crr daa dac dad dae dam dao dar dca dcc dcd dce dcm dco dcr dda ddc ddd dde ddm ddo ddr de- dea dec ded dee dem deo der dma dmc dmd dme dmm dmo dmr doa doc dod doe dom doo dor dra drc drd dre drm dro drr eaa eac ead eae eam eao ear ec- eca ecc ecd ece ecm eco ecr ed- eda edc edd ede edm edo edr eea eec eed eee eem eeo eer em- ema emc emd eme emm emo emr eo- eoa eoc eod eoe eom eoo eor era erc erd ere erm ero err m-o m-r maa mac mad mae mam mao mar mc- mca mcc mcd mce mcm mco mcr mda mdc mdd mde mdm mdo mdr mea mec med mee mem meo mer mma mmc mmd mme mmm mmo mmr moa moc mod moe mom moo mor mra mrc mrd mre mrm mro mrr oaa oac oad oae oam oao oar oc- oca occ ocd ocm oco ocr oda odc odd ode odm odo odr oea oec oed oee oem oeo oer om- oma omc omd ome omm omo omr oo- ooa ooc ood oom ooo oor or- ora orc ord ore orm oro orr ra- raa rac rad rae ram rao rar rca rcc rcd rce rcm rco rcr rda rdc rdd rde rdm rdo rdr re- rea rec red ree rem reo rer rma rmc rmd rme rmm rmo rmr roa roc rod roe rom roo ror rra rrc rrd rrm rrr