-er ddd dde ddi ddo ddr dds ddu ddx de- ded dee dei deo der des deu dex di- did die dii dio dir dis diu dix dod doe doi doo dor dos dou dox drd dre dri dro drr drs dru drx dsd dse dsi dso dsr dss dsu dsx dud due dui duo dur dus dux dxd dxi dxo dxr dxs dxx ed- edd ede edi edo edr eds edu edx eed eee eeo eer ees eex eid eie eii eio eir eis eiu eix eo- eod eoe eoi eoo eor eos eou erd ere eri ero err ers eru es- esd ese esi eso esr ess esu esx eu- eud eue eui eur eus eux ex- exd exe exi exo exr exs exu exx i-d idd ide idi ido idr ids idu idx ie- ied iee iei ier ies iex iid iie iii iio iir iis iiu iix io- iod ioe ioi ioo ior ios iou ir- ird ire iri iro irr irs iru irx is- isd ise isi iso isr iss isu iu- iud iue iui iur ius ixe ixi o-i odd ode odi odo odr ods odu oed oee oei oeo oer oes oex oid oie oii oio oir ois oiu oo- ood ooi ooo oor oos oox or- ord ore ori oro orr ors oru orx os- osd ose osi oso osr oss osu osx ou- oud oue oui ouo our ous ox- oxi oxo oxx rdd rde rdi rdo rdr rds rdu rdx re- red ree rei reo rer res reu rex rid rie rii rio rir ris rix rod roe roi roo ror ros rou rox rrd rri rrr rrs rru rsd rse rsi rso rsr rss rsu rsx rud rue rui ruo rur rus ruu rux rxr rxs sdd sde sdi sdo sdr sds sdu se- sed see sei seo ser ses seu sex sid sie sii sio sir sis siu six sod soe soi soo sor sos sou sox sr- srd sre sri sro srr srs srx ss- ssd sse ssi sso ssr sss ssu ssx sud sue sui suo sur sus suu sux sxi sxs sxu udd ude udi udo udr uds udu udx ued uee uei uer ues uid uie uii uio uir uis uiu uod uoe uoo uor uos uox ur- urd ure uri uro urr urs uru urx usd use usi uso usr uss usu usx uue uur uus uuu uxo uxr uxu xde xdi xdr xds xed xee xer xes xeu xex xie xii xio xis xiu xix xod xoi xoo xor xos xox xrd xrx xsi xss xue xui xus xxi xxo xxx