-er ddd dde ddi ddk ddn ddo ddr dds de- ded dee dei dek den deo der des di- did die dii dik din dio dir dis dke dki dkk dko dkr dks dnd dne dni dnk dnn dno dnr dns dod doe doi dok don doo dor dos drd dre dri drk drn dro drr drs dsd dse dsi dsk dsn dso dsr dss ed- edd ede edi edk edn edo edr eds eed eee eek een eeo eer ees eid eie eii eik ein eio eir eis ekd eke eki eko ekr eks en- end ene eni enk enn eno enr ens eo- eod eoe eoi eok eon eoo eor eos erd ere eri erk ern ero err ers es- esd ese esi esk esn eso esr ess i-d idd ide idi idk idn ido idr ids ie- ied iee iei iek ien ier ies iid iie iii iin iio iir iis ike iki ikk iko ikr iks in- ind ine ini ink inn ino inr ins io- iod ioe ioi ion ioo ior ios ir- ird ire iri irk irn iro irr irs is- isd ise isi isk isn iso isr iss kde kdk kdo kdr kds ke- ked kee kei kek ken keo ker kes kid kie kii kik kin kio kir kis kke kki kkk kkn kkr kks kn- knd kne kni knk knn kno knr kod koe koi kok kon koo kor kos krd kri krk krn kro krr krs ksd kse ksi ksk ksn kso ksr kss n-i ndd nde ndi ndk ndn ndo ndr nds ne- ned nee nei nek nen neo ner nes nid nie nii nik nin nio nir nis nke nki nkk nkn nko nkr nks nne nni nnk nnn nno nns no- nod noe noi nok non noo nor nos nrd nre nri nrk nrn nro nrr nrs nsd nse nsi nsk nsn nso nsr nss o-i odd ode odi odn odo odr ods oed oee oei oen oeo oer oes oid oie oii oik oin oio oir ois okd oke oki okk oko okr oks on- ond one oni onk onn ono onr ons oo- ood ooi ook oon ooo oor oos or- ord ore ori ork orn oro orr ors os- osd ose osi osk osn oso osr oss rdd rde rdi rdn rdo rdr rds re- red ree rei rek ren reo rer res rid rie rii rik rin rio rir ris rke rkk rko rks rnd rni rnn rno rnr rns rod roe roi rok ron roo ror ros rrd rri rrk rrn rrr rrs rsd rse rsi rsk rsn rso rsr rss sdd sde sdi sdk sdn sdo sdr sds se- sed see sei sek sen seo ser ses sid sie sii sik sin sio sir sis sk- skd ske ski skk sko skr sks snd sne sni snk snn sno snr sns sod soe soi sok son soo sor sos sr- srd sre sri srk srn sro srr srs ss- ssd sse ssi ssk ssn sso ssr sss