-er ddd dde ddo ddq ddr dds ddt ddu de- ded dee deo deq der des det deu dod doe doo doq dor dos dot dou dqe dqs drd dre dro drq drr drs drt dru dsd dse dso dsq dsr dss dst dsu dtd dte dto dtr dts dtt dtu dud due duo dur dus dut ed- edd ede edo edr eds edt edu eed eee eeo eer ees eet eo- eod eoe eoo eoq eor eos eot eou eqe eqq eqs eqt equ erd ere ero erq err ers ert eru es- esd ese eso esq esr ess est esu etd ete eto etr ets ett etu eu- eud eue eur eus eut odd ode odo odr ods odt odu oed oee oeo oer oes oet oo- ood ooo oor oos oot oqo or- ord ore oro orr ors ort oru os- osd ose oso osq osr oss ost osu ot- otd ote oto otr ots ott otu ou- oud oue ouo our ous out qdr qds qdt qed qee qeo qet qoo qor qos qqq qqu qre qrs qrt qru qsd qso qsr qst qtd qto qtq qtr qts qu- qud que quo qur qus qut rdd rde rdo rdr rds rdt rdu re- red ree reo req rer res ret reu rod roe roo ror ros rot rou rqs rrd rrq rrr rrs rrt rru rsd rse rso rsq rsr rss rst rsu rtd rte rto rtq rtr rts rtt rtu rud rue ruo rur rus rut ruu sdd sde sdo sdq sdr sds sdt sdu se- sed see seo seq ser ses set seu sod soe soo soq sor sos sot sou sqd sqq sqr sqs sr- srd sre sro srq srr srs srt ss- ssd sse sso ssq ssr sss sst ssu std ste sto stq str sts stt stu sud sue suo suq sur sus sut suu tdd tde tdo tdr tds tdt tdu te- ted tee teo teq ter tes tet teu to- tod toe too toq tor tos tot tou tqo trd tre tro trq trr trs trt tru tsd tse tso tsq tsr tss tst tsu ttd tte tto ttr tts ttt ttu tud tue tuo tur tus tut tuu udd ude udo udr uds udt udu ued uee uer ues uet uod uoe uoo uor uos uot ur- urd ure uro urr urs urt uru usd use uso usr uss ust usu utd ute uto utr uts utt utu uue uur uus uut uuu