-er ddd dde ddi ddo ddr dds ddx ddz de- ded dee dei deo der des dex dez di- did die dii dio dir dis dix diz dod doe doi doo dor dos dox doz drd dre dri dro drr drs drx drz dsd dse dsi dso dsr dss dsx dsz dxd dxi dxo dxr dxs dxx dzd dze dzi dzo dzr dzs ed- edd ede edi edo edr eds edx eed eee eeo eer ees eex eid eie eii eio eir eis eix eo- eod eoe eoi eoo eor eos erd ere eri ero err ers erz es- esd ese esi eso esr ess esx ex- exd exe exi exo exr exs exx eze ezo ezr ezs ezz i-d idd ide idi ido idr ids idx ie- ied iee iei ier ies iex iid iie iii iio iir iis iix io- iod ioe ioi ioo ior ios ir- ird ire iri iro irr irs irx is- isd ise isi iso isr iss ixe ixi ize izi izo izz o-i odd ode odi odo odr ods oed oee oei oeo oer oes oex oid oie oii oio oir ois oiz oo- ood ooi ooo oor oos oox or- ord ore ori oro orr ors orx orz os- osd ose osi oso osr oss osx ox- oxi oxo oxx oze ozo ozs ozz rdd rde rdi rdo rdr rds rdx re- red ree rei reo rer res rex rez rid rie rii rio rir ris rix riz rod roe roi roo ror ros rox roz rrd rri rrr rrs rsd rse rsi rso rsr rss rsx rxr rxs rze rzo sdd sde sdi sdo sdr sds sdz se- sed see sei seo ser ses sex sez sid sie sii sio sir sis six sod soe soi soo sor sos sox soz sr- srd sre sri sro srr srs srx ss- ssd sse ssi sso ssr sss ssx ssz sxi sxs szd sze szi szr xde xdi xdr xds xed xee xer xes xex xie xii xio xis xix xod xoi xoo xor xos xox xrd xrx xsi xss xxi xxo xxx zds zed zee zeo zer zes zez zid zie zio zir zis zix ziz zo- zod zoe zoi zoo zor zos zox zro zrs zse zsi zsz zxx zzr zzs zzx zzz