-er ddd dde ddn ddo ddr dds ddt ddu de- ded dee den deo der des det deu dnd dne dnn dno dnr dns dnt dod doe don doo dor dos dot dou drd dre drn dro drr drs drt dru dsd dse dsn dso dsr dss dst dsu dtd dte dtn dto dtr dts dtt dtu dud due dun duo dur dus dut ed- edd ede edn edo edr eds edt edu eed eee een eeo eer ees eet en- end ene enn eno enr ens ent enu eo- eod eoe eon eoo eor eos eot eou erd ere ern ero err ers ert eru es- esd ese esn eso esr ess est esu etd ete etn eto etr ets ett etu eu- eud eue eun eur eus eut ndd nde ndn ndo ndr nds ndt ndu ne- ned nee nen neo ner nes net neu nne nnn nno nns nnt nnu no- nod noe non noo nor nos not nou nrd nre nrn nro nrr nrs nrt nru nsd nse nsn nso nsr nss nst nsu ntd nte ntn nto ntr nts ntt ntu nud nue nun nuo nur nus nut nuu odd ode odn odo odr ods odt odu oed oee oen oeo oer oes oet on- ond one onn ono onr ons ont onu oo- ood oon ooo oor oos oot or- ord ore orn oro orr ors ort oru os- osd ose osn oso osr oss ost osu ot- otd ote otn oto otr ots ott otu ou- oud oue oun ouo our ous out rdd rde rdn rdo rdr rds rdt rdu re- red ree ren reo rer res ret reu rnd rnn rno rnr rns rnt rnu rod roe ron roo ror ros rot rou rrd rrn rrr rrs rrt rru rsd rse rsn rso rsr rss rst rsu rtd rte rtn rto rtr rts rtt rtu rud rue run ruo rur rus rut ruu sdd sde sdn sdo sdr sds sdt sdu se- sed see sen seo ser ses set seu snd sne snn sno snr sns snt snu sod soe son soo sor sos sot sou sr- srd sre srn sro srr srs srt ss- ssd sse ssn sso ssr sss sst ssu std ste stn sto str sts stt stu sud sue sun suo sur sus sut suu tdd tde tdn tdo tdr tds tdt tdu te- ted tee ten teo ter tes tet teu tnd tne tnn tno tnr tns tnt to- tod toe ton too tor tos tot tou trd tre trn tro trr trs trt tru tsd tse tsn tso tsr tss tst tsu ttd tte ttn tto ttr tts ttt ttu tud tue tun tuo tur tus tut tuu udd ude udn udo udr uds udt udu ued uee uen uer ues uet un- und une unn uno unr uns unt unu uod uoe uon uoo uor uos uot ur- urd ure urn uro urr urs urt uru usd use usn uso usr uss ust usu utd ute utn uto utr uts utt utu uue uun uur uus uut uuu