-er ddd dde ddf ddk ddn ddo ddr de- ded dee def dek den deo der dfd dfe dff dfk dfn dfo dfr dke dkk dko dkr dnd dne dnf dnk dnn dno dnr dod doe dof dok don doo dor drd dre drk drn dro drr ed- edd ede edf edk edn edo edr eed eee eef eek een eeo eer ef- efd efe eff efo efr ekd eke ekf eko ekr en- end ene enf enk enn eno enr eo- eod eoe eof eok eon eoo eor erd ere erf erk ern ero err fdd fde fdf fdk fdn fdo fdr fed fee fef fek fen feo fer ffd ffe fff ffk ffn ffo ffr fkf fkk fnd fne fnf fnk fnn fnr foe fof fok fon foo for frd fre frf frk frn fro frr kde kdf kdk kdo kdr ke- ked kee kef kek ken keo ker kfd kff kfo kke kkk kkn kkr kn- knd kne knf knk knn kno knr kod koe kof kok kon koo kor krd krf krk krn kro krr ndd nde ndf ndk ndn ndo ndr ne- ned nee nef nek nen neo ner nfd nfe nff nfk nfn nfo nfr nke nkf nkk nkn nko nkr nne nnf nnk nnn nno no- nod noe nof nok non noo nor nrd nre nrf nrk nrn nro nrr odd ode odf odn odo odr oed oee oef oen oeo oer of- ofd ofe off ofn ofo ofr okd oke okk oko okr on- ond one onf onk onn ono onr oo- ood oof ook oon ooo oor or- ord ore orf ork orn oro orr rdd rde rdf rdn rdo rdr re- red ree ref rek ren reo rer rfd rfe rff rfk rfn rfo rfr rke rkf rkk rko rnd rnn rno rnr rod roe rof rok ron roo ror rrd rrf rrk rrn rrr