-er ddd dde ddf ddi ddk ddn ddo ddr de- ded dee def dei dek den deo der dfd dfe dff dfi dfk dfn dfo dfr di- did die dif dii dik din dio dir dke dki dkk dko dkr dnd dne dnf dni dnk dnn dno dnr dod doe dof doi dok don doo dor drd dre dri drk drn dro drr ed- edd ede edf edi edk edn edo edr eed eee eef eek een eeo eer ef- efd efe eff efi efo efr eid eie eif eii eik ein eio eir ekd eke ekf eki eko ekr en- end ene enf eni enk enn eno enr eo- eod eoe eof eoi eok eon eoo eor erd ere erf eri erk ern ero err fdd fde fdf fdi fdk fdn fdo fdr fed fee fef fei fek fen feo fer ffd ffe fff ffi ffk ffn ffo ffr fid fie fif fii fik fin fir fkf fki fkk fnd fne fnf fni fnk fnn fnr foe fof foi fok fon foo for frd fre frf fri frk frn fro frr i-d i-f idd ide idf idi idk idn ido idr ie- ied iee ief iei iek ien ier ifd ife iff ifi ifn ifo ifr iid iie iif iii iin iio iir ike ikf iki ikk iko ikr in- ind ine inf ini ink inn ino inr io- iod ioe iof ioi ion ioo ior ir- ird ire irf iri irk irn iro irr kde kdf kdk kdo kdr ke- ked kee kef kei kek ken keo ker kfd kff kfi kfo kid kie kif kii kik kin kio kir kke kki kkk kkn kkr kn- knd kne knf kni knk knn kno knr kod koe kof koi kok kon koo kor krd krf kri krk krn kro krr n-i ndd nde ndf ndi ndk ndn ndo ndr ne- ned nee nef nei nek nen neo ner nfd nfe nff nfi nfk nfn nfo nfr nid nie nif nii nik nin nio nir nke nkf nki nkk nkn nko nkr nne nnf nni nnk nnn nno no- nod noe nof noi nok non noo nor nrd nre nrf nri nrk nrn nro nrr o-i odd ode odf odi odn odo odr oed oee oef oei oen oeo oer of- ofd ofe off ofi ofn ofo ofr oid oie oif oii oik oin oio oir okd oke oki okk oko okr on- ond one onf oni onk onn ono onr oo- ood oof ooi ook oon ooo oor or- ord ore orf ori ork orn oro orr rdd rde rdf rdi rdn rdo rdr re- red ree ref rei rek ren reo rer rfd rfe rff rfi rfk rfn rfo rfr rid rie rif rii rik rin rio rir rke rkf rkk rko rnd rni rnn rno rnr rod roe rof roi rok ron roo ror rrd rrf rri rrk rrn rrr