-er ddd dde ddk ddn ddo ddr dds ddt de- ded dee dek den deo der des det dke dkk dko dkr dks dkt dnd dne dnk dnn dno dnr dns dnt dod doe dok don doo dor dos dot drd dre drk drn dro drr drs drt dsd dse dsk dsn dso dsr dss dst dtd dte dtk dtn dto dtr dts dtt ed- edd ede edk edn edo edr eds edt eed eee eek een eeo eer ees eet ekd eke eko ekr eks ekt en- end ene enk enn eno enr ens ent eo- eod eoe eok eon eoo eor eos eot erd ere erk ern ero err ers ert es- esd ese esk esn eso esr ess est etd ete etk etn eto etr ets ett k-t kde kdk kdo kdr kds kdt ke- ked kee kek ken keo ker kes ket kke kkk kkn kkr kks kkt kn- knd kne knk knn kno knr knt kod koe kok kon koo kor kos kot krd krk krn kro krr krs krt ksd kse ksk ksn kso ksr kss kst kte ktk ktn kto ktr kts ktt ndd nde ndk ndn ndo ndr nds ndt ne- ned nee nek nen neo ner nes net nke nkk nkn nko nkr nks nkt nne nnk nnn nno nns nnt no- nod noe nok non noo nor nos not nrd nre nrk nrn nro nrr nrs nrt nsd nse nsk nsn nso nsr nss nst ntd nte ntk ntn nto ntr nts ntt odd ode odn odo odr ods odt oed oee oen oeo oer oes oet okd oke okk oko okr oks on- ond one onk onn ono onr ons ont oo- ood ook oon ooo oor oos oot or- ord ore ork orn oro orr ors ort os- osd ose osk osn oso osr oss ost ot- otd ote otk otn oto otr ots ott rdd rde rdn rdo rdr rds rdt re- red ree rek ren reo rer res ret rke rkk rko rks rkt rnd rnn rno rnr rns rnt rod roe rok ron roo ror ros rot rrd rrk rrn rrr rrs rrt rsd rse rsk rsn rso rsr rss rst rtd rte rtk rtn rto rtr rts rtt sdd sde sdk sdn sdo sdr sds sdt se- sed see sek sen seo ser ses set sk- skd ske skk sko skr sks skt snd sne snk snn sno snr sns snt sod soe sok son soo sor sos sot sr- srd sre srk srn sro srr srs srt ss- ssd sse ssk ssn sso ssr sss sst std ste stk stn sto str sts stt tdd tde tdk tdn tdo tdr tds tdt te- ted tee tek ten teo ter tes tet tke tkk tko tkr tks tkt tnd tne tnk tnn tno tnr tns tnt to- tod toe tok ton too tor tos tot trd tre trk trn tro trr trs trt tsd tse tsk tsn tso tsr tss tst ttd tte ttk ttn tto ttr tts ttt