-er ddd dde ddo ddq ddr dds ddu de- ded dee deo deq der des deu dod doe doo doq dor dos dou dqe dqs drd dre dro drq drr drs dru dsd dse dso dsq dsr dss dsu dud due duo dur dus ed- edd ede edo edr eds edu eed eee eeo eer ees eo- eod eoe eoo eoq eor eos eou eqe eqq eqs equ erd ere ero erq err ers eru es- esd ese eso esq esr ess esu eu- eud eue eur eus odd ode odo odr ods odu oed oee oeo oer oes oo- ood ooo oor oos oqo or- ord ore oro orr ors oru os- osd ose oso osq osr oss osu ou- oud oue ouo our ous qdr qds qed qee qeo qoo qor qos qqq qqu qre qrs qru qsd qso qsr qu- qud que quo qur qus rdd rde rdo rdr rds rdu re- red ree reo req rer res reu rod roe roo ror ros rou rqs rrd rrq rrr rrs rru rsd rse rso rsq rsr rss rsu rud rue ruo rur rus ruu sdd sde sdo sdq sdr sds sdu se- sed see seo seq ser ses seu sod soe soo soq sor sos sou sqd sqq sqr sqs sr- srd sre sro srq srr srs ss- ssd sse sso ssq ssr sss ssu sud sue suo suq sur sus suu udd ude udo udr uds udu ued uee uer ues uod uoe uoo uor uos ur- urd ure uro urr urs uru usd use uso usr uss usu uue uur uus uuu