-er ddd dde ddi ddo ddr dds ddt ddu ddx de- ded dee dei deo der des det deu dex di- did die dii dio dir dis dit diu dix dod doe doi doo dor dos dot dou dox drd dre dri dro drr drs drt dru drx dsd dse dsi dso dsr dss dst dsu dsx dtd dte dti dto dtr dts dtt dtu dtx dud due dui duo dur dus dut dux dxd dxi dxo dxr dxs dxt dxx ed- edd ede edi edo edr eds edt edu edx eed eee eeo eer ees eet eex eid eie eii eio eir eis eit eiu eix eo- eod eoe eoi eoo eor eos eot eou erd ere eri ero err ers ert eru es- esd ese esi eso esr ess est esu esx etd ete eti eto etr ets ett etu etx eu- eud eue eui eur eus eut eux ex- exd exe exi exo exr exs ext exu exx i-d idd ide idi ido idr ids idt idu idx ie- ied iee iei ier ies iet iex iid iie iii iio iir iis iit iiu iix io- iod ioe ioi ioo ior ios iot iou ir- ird ire iri iro irr irs irt iru irx is- isd ise isi iso isr iss ist isu itd ite iti ito its itt itu itx iu- iud iue iui iur ius iut ixe ixi o-i odd ode odi odo odr ods odt odu oed oee oei oeo oer oes oet oex oid oie oii oio oir ois oit oiu oo- ood ooi ooo oor oos oot oox or- ord ore ori oro orr ors ort oru orx os- osd ose osi oso osr oss ost osu osx ot- otd ote oti oto otr ots ott otu ou- oud oue oui ouo our ous out ox- oxi oxo oxt oxx rdd rde rdi rdo rdr rds rdt rdu rdx re- red ree rei reo rer res ret reu rex rid rie rii rio rir ris rit rix rod roe roi roo ror ros rot rou rox rrd rri rrr rrs rrt rru rsd rse rsi rso rsr rss rst rsu rsx rtd rte rti rto rtr rts rtt rtu rtx rud rue rui ruo rur rus rut ruu rux rxr rxs sdd sde sdi sdo sdr sds sdt sdu se- sed see sei seo ser ses set seu sex sid sie sii sio sir sis sit siu six sod soe soi soo sor sos sot sou sox sr- srd sre sri sro srr srs srt srx ss- ssd sse ssi sso ssr sss sst ssu ssx std ste sti sto str sts stt stu stx sud sue sui suo sur sus sut suu sux sxi sxs sxt sxu t-x tdd tde tdi tdo tdr tds tdt tdu tdx te- ted tee tei teo ter tes tet teu tex tid tie tii tio tir tis tit tiu tix to- tod toe toi too tor tos tot tou tox trd tre tri tro trr trs trt tru trx tsd tse tsi tso tsr tss tst tsu tsx ttd tte tti tto ttr tts ttt ttu ttx tud tue tui tuo tur tus tut tuu tux txe txi txs txt txu udd ude udi udo udr uds udt udu udx ued uee uei uer ues uet uid uie uii uio uir uis uit uiu uod uoe uoo uor uos uot uox ur- urd ure uri uro urr urs urt uru urx usd use usi uso usr uss ust usu usx utd ute uti uto utr uts utt utu utx uue uur uus uut uuu uxo uxr uxt uxu xde xdi xdr xds xdt xed xee xer xes xet xeu xex xie xii xio xis xit xiu xix xod xoi xoo xor xos xot xox xrd xrt xrx xsi xss xst xti xtr xts xtx xue xui xus xxi xxo xxx