-er ddd dde ddi ddk ddo ddr dds ddz de- ded dee dei dek deo der des dez di- did die dii dik dio dir dis diz dke dki dkk dko dkr dks dod doe doi dok doo dor dos doz drd dre dri drk dro drr drs drz dsd dse dsi dsk dso dsr dss dsz dzd dze dzi dzo dzr dzs ed- edd ede edi edk edo edr eds eed eee eek eeo eer ees eid eie eii eik eio eir eis ekd eke eki eko ekr eks eo- eod eoe eoi eok eoo eor eos erd ere eri erk ero err ers erz es- esd ese esi esk eso esr ess eze ezo ezr ezs ezz i-d idd ide idi idk ido idr ids ie- ied iee iei iek ier ies iid iie iii iio iir iis ike iki ikk iko ikr iks io- iod ioe ioi ioo ior ios ir- ird ire iri irk iro irr irs is- isd ise isi isk iso isr iss ize izi izo izz k-z kde kdk kdo kdr kds ke- ked kee kei kek keo ker kes kez kid kie kii kik kio kir kis kiz kke kki kkk kkr kks kod koe koi kok koo kor kos koz krd kri krk kro krr krs ksd kse ksi ksk kso ksr kss kzo o-i odd ode odi odo odr ods oed oee oei oeo oer oes oid oie oii oik oio oir ois oiz okd oke oki okk oko okr oks oo- ood ooi ook ooo oor oos or- ord ore ori ork oro orr ors orz os- osd ose osi osk oso osr oss oze ozo ozs ozz rdd rde rdi rdo rdr rds re- red ree rei rek reo rer res rez rid rie rii rik rio rir ris riz rke rkk rko rks rkz rod roe roi rok roo ror ros roz rrd rri rrk rrr rrs rsd rse rsi rsk rso rsr rss rze rzo sdd sde sdi sdk sdo sdr sds sdz se- sed see sei sek seo ser ses sez sid sie sii sik sio sir sis sk- skd ske ski skk sko skr sks sod soe soi sok soo sor sos soz sr- srd sre sri srk sro srr srs ss- ssd sse ssi ssk sso ssr sss ssz szd sze szi szr zds zed zee zek zeo zer zes zez zid zie zik zio zir zis ziz zks zo- zod zoe zoi zok zoo zor zos zro zrs zse zsi zsz zzr zzs zzz