-er ddd dde ddi ddq ddr dds ddu de- ded dee dei deq der des deu di- did die dii diq dir dis diu dqe dqs drd dre dri drq drr drs dru dsd dse dsi dsq dsr dss dsu dud due dui dur dus ed- edd ede edi edr eds edu eed eee eer ees eid eie eii eir eis eiu eqe eqq eqs equ erd ere eri erq err ers eru es- esd ese esi esq esr ess esu eu- eud eue eui eur eus i-d idd ide idi idq idr ids idu ie- ied iee iei ier ies iid iie iii iir iis iiu iqd iqe iqs iqu ir- ird ire iri irq irr irs iru is- isd ise isi isq isr iss isu iu- iud iue iui iur ius qdr qds qed qee qid qie qir qis qiu qqq qqu qre qri qrs qru qsd qsi qsr qu- qud que qui qur qus rdd rde rdi rdr rds rdu re- red ree rei req rer res reu rid rie rii riq rir ris rqs rrd rri rrq rrr rrs rru rsd rse rsi rsq rsr rss rsu rud rue rui rur rus ruu sdd sde sdi sdq sdr sds sdu se- sed see sei seq ser ses seu sid sie sii siq sir sis siu sqd sqi sqq sqr sqs sr- srd sre sri srq srr srs ss- ssd sse ssi ssq ssr sss ssu sud sue sui suq sur sus suu udd ude udi udr uds udu ued uee uei uer ues uid uie uii uiq uir uis uiu ur- urd ure uri urr urs uru usd use usi usr uss usu uue uur uus uuu