-er ddd dde ddk ddn ddo ddr dds de- ded dee dek den deo der des dke dkk dko dkr dks dnd dne dnk dnn dno dnr dns dod doe dok don doo dor dos drd dre drk drn dro drr drs dsd dse dsk dsn dso dsr dss ed- edd ede edk edn edo edr eds eed eee eek een eeo eer ees ekd eke eko ekr eks en- end ene enk enn eno enr ens eo- eod eoe eok eon eoo eor eos erd ere erk ern ero err ers es- esd ese esk esn eso esr ess kde kdk kdo kdr kds ke- ked kee kek ken keo ker kes kke kkk kkn kkr kks kn- knd kne knk knn kno knr kod koe kok kon koo kor kos krd krk krn kro krr krs ksd kse ksk ksn kso ksr kss ndd nde ndk ndn ndo ndr nds ne- ned nee nek nen neo ner nes nke nkk nkn nko nkr nks nne nnk nnn nno nns no- nod noe nok non noo nor nos nrd nre nrk nrn nro nrr nrs nsd nse nsk nsn nso nsr nss odd ode odn odo odr ods oed oee oen oeo oer oes okd oke okk oko okr oks on- ond one onk onn ono onr ons oo- ood ook oon ooo oor oos or- ord ore ork orn oro orr ors os- osd ose osk osn oso osr oss rdd rde rdn rdo rdr rds re- red ree rek ren reo rer res rke rkk rko rks rnd rnn rno rnr rns rod roe rok ron roo ror ros rrd rrk rrn rrr rrs rsd rse rsk rsn rso rsr rss sdd sde sdk sdn sdo sdr sds se- sed see sek sen seo ser ses sk- skd ske skk sko skr sks snd sne snk snn sno snr sns sod soe sok son soo sor sos sr- srd sre srk srn sro srr srs ss- ssd sse ssk ssn sso ssr sss