-er a-a a-c aaa aac aad aae aag aam aao aar ac- aca acc acd ace acg acm aco acr ad- ada adc add ade adg adm ado adr aea aec aed aee aeg aem aeo aer ag- aga agc agd age agg agm ago agr ama amc amd ame amg amm amo amr aoa aoc aod aoe aog aom aoo aor ar- ara arc ard are arg arm aro arr c-- caa cac cad cae cag cam cao car cca ccc ccd cce ccg ccm cco ccr cda cdc cdd cde cdg cdm cdo cdr ce- cea cec ced cee ceg cem ceo cer cga cgc cgd cge cgg cgm cgo cgr cma cmc cmd cme cmg cmm cmo cmr co- coa coc cod coe cog com coo cor cra crc crd cre crg crm cro crr daa dac dad dae dag dam dao dar dca dcc dcd dce dcg dcm dco dcr dda ddc ddd dde ddg ddm ddo ddr de- dea dec ded dee deg dem deo der dga dgc dgd dge dgg dgm dgr dma dmc dmd dme dmg dmm dmo dmr doa doc dod doe dog dom doo dor dra drc drd dre drg drm dro drr eaa eac ead eae eag eam eao ear ec- eca ecc ecd ece ecg ecm eco ecr ed- eda edc edd ede edg edm edo edr eea eec eed eee eeg eem eeo eer ega egc egd ege egg egm ego egr em- ema emc emd eme emg emm emo emr eo- eoa eoc eod eoe eog eom eoo eor era erc erd ere erg erm ero err g-d gaa gac gad gae gag gam gao gar gca gcc gcd gce gcg gcm gco gcr gda gdc gdd gde gdm gdo gdr ge- gea gec ged gee geg gem geo ger gga ggc ggd ggg ggm ggo ggr gma gmc gmd gme gmg gmm gmo gmr goa goc god goe gog gom goo gor gra grc grd gre grg grm gro grr m-o m-r maa mac mad mae mag mam mao mar mc- mca mcc mcd mce mcg mcm mco mcr mda mdc mdd mde mdg mdm mdo mdr mea mec med mee meg mem meo mer mga mgc mgd mge mgm mgo mgr mma mmc mmd mme mmg mmm mmo mmr moa moc mod moe mog mom moo mor mra mrc mrd mre mrg mrm mro mrr oaa oac oad oae oag oam oao oar oc- oca occ ocd ocg ocm oco ocr oda odc odd ode odg odm odo odr oea oec oed oee oeg oem oeo oer oga ogc ogd oge ogg ogo om- oma omc omd ome omg omm omo omr oo- ooa ooc ood oog oom ooo oor or- ora orc ord ore org orm oro orr ra- raa rac rad rae rag ram rao rar rca rcc rcd rce rcg rcm rco rcr rda rdc rdd rde rdg rdm rdo rdr re- rea rec red ree reg rem reo rer rga rgc rgd rge rgg rgo rgr rma rmc rmd rme rmg rmm rmo rmr roa roc rod roe rog rom roo ror rra rrc rrd rrg rrm rrr