-er ddd dde ddg ddn ddo ddr de- ded dee deg den deo der dgd dge dgg dgn dgr dnd dne dng dnn dno dnr dod doe dog don doo dor drd dre drg drn dro drr ed- edd ede edg edn edo edr eed eee eeg een eeo eer egd ege egg egn ego egr en- end ene eng enn eno enr eo- eod eoe eog eon eoo eor erd ere erg ern ero err g-d gdd gde gdn gdo gdr ge- ged gee geg gen geo ger ggd ggg ggn ggo ggr gnd gne gnn gno gnr god goe gog gon goo gor grd gre grg grn gro grr ndd nde ndg ndn ndo ndr ne- ned nee neg nen neo ner ngd nge ngg ngn ngo nne nng nnn nno no- nod noe nog non noo nor nrd nre nrg nrn nro nrr odd ode odg odn odo odr oed oee oeg oen oeo oer ogd oge ogg ogn ogo on- ond one ong onn ono onr oo- ood oog oon ooo oor or- ord ore org orn oro orr rdd rde rdg rdn rdo rdr re- red ree reg ren reo rer rgd rge rgg rgn rgo rgr rnd rng rnn rno rnr rod roe rog ron roo ror rrd rrg rrn rrr