-er a-a a-c aaa aac aad aae aaf aam aao aar ac- aca acc acd ace acf acm aco acr ad- ada adc add ade adf adm ado adr aea aec aed aee aef aem aeo aer af- afa afc afd afe aff afm afo afr ama amc amd ame amf amm amo amr aoa aoc aod aoe aof aom aoo aor ar- ara arc ard are arf arm aro arr c-- caa cac cad cae caf cam cao car cca ccc ccd cce ccf ccm cco ccr cda cdc cdd cde cdf cdm cdo cdr ce- cea cec ced cee cef cem ceo cer cfa cfc cfd cfe cff cfm cfo cfr cma cmc cmd cme cmf cmm cmo cmr co- coa coc cod coe cof com coo cor cra crc crd cre crf crm cro crr daa dac dad dae daf dam dao dar dca dcc dcd dce dcf dcm dco dcr dda ddc ddd dde ddf ddm ddo ddr de- dea dec ded dee def dem deo der dfa dfc dfd dfe dff dfm dfo dfr dma dmc dmd dme dmf dmm dmo dmr doa doc dod doe dof dom doo dor dra drc drd dre drm dro drr eaa eac ead eae eaf eam eao ear ec- eca ecc ecd ece ecf ecm eco ecr ed- eda edc edd ede edf edm edo edr eea eec eed eee eef eem eeo eer ef- efa efc efd efe eff efm efo efr em- ema emc emd eme emf emm emo emr eo- eoa eoc eod eoe eof eom eoo eor era erc erd ere erf erm ero err faa fac fad fae faf fam fao far fca fcc fcd fce fcf fcm fco fcr fda fdc fdd fde fdf fdm fdo fdr fea fec fed fee fef fem feo fer ffa ffc ffd ffe fff ffm ffo ffr fma fmc fmd fme fmf fmm fmo fmr foa foc foe fof fom foo for fra frc frd fre frf frm fro frr m-f m-o m-r maa mac mad mae maf mam mao mar mc- mca mcc mcd mce mcf mcm mco mcr mda mdc mdd mde mdf mdm mdo mdr mea mec med mee mef mem meo mer mfa mfc mfd mfe mff mfm mfo mfr mma mmc mmd mme mmf mmm mmo mmr moa moc mod moe mof mom moo mor mra mrc mrd mre mrf mrm mro mrr oaa oac oad oae oaf oam oao oar oc- oca occ ocd ocf ocm oco ocr oda odc odd ode odf odm odo odr oea oec oed oee oef oem oeo oer of- ofa ofc ofd ofe off ofm ofo ofr om- oma omc omd ome omf omm omo omr oo- ooa ooc ood oof oom ooo oor or- ora orc ord ore orf orm oro orr ra- raa rac rad rae raf ram rao rar rca rcc rcd rce rcf rcm rco rcr rda rdc rdd rde rdf rdm rdo rdr re- rea rec red ree ref rem reo rer rfa rfc rfd rfe rff rfm rfo rfr rma rmc rmd rme rmf rmm rmo rmr roa roc rod roe rof rom roo ror rra rrc rrd rrf rrm rrr