-er ddd dde ddi ddn ddo ddr dds ddx de- ded dee dei den deo der des dex di- did die dii din dio dir dis dix dnd dne dni dnn dno dnr dns dod doe doi don doo dor dos dox drd dre dri drn dro drr drs drx dsd dse dsi dsn dso dsr dss dsx dxd dxi dxn dxo dxr dxs dxx ed- edd ede edi edn edo edr eds edx eed eee een eeo eer ees eex eid eie eii ein eio eir eis eix en- end ene eni enn eno enr ens eo- eod eoe eoi eon eoo eor eos erd ere eri ern ero err ers es- esd ese esi esn eso esr ess esx ex- exd exe exi exo exr exs exx i-d idd ide idi idn ido idr ids idx ie- ied iee iei ien ier ies iex iid iie iii iin iio iir iis iix in- ind ine ini inn ino inr ins inx io- iod ioe ioi ion ioo ior ios ir- ird ire iri irn iro irr irs irx is- isd ise isi isn iso isr iss ixe ixi ixn n-i ndd nde ndi ndn ndo ndr nds ne- ned nee nei nen neo ner nes nex nid nie nii nin nio nir nis nix nne nni nnn nno nns no- nod noe noi non noo nor nos nox nrd nre nri nrn nro nrr nrs nrx nsd nse nsi nsn nso nsr nss nsx nxd o-i odd ode odi odn odo odr ods oed oee oei oen oeo oer oes oex oid oie oii oin oio oir ois on- ond one oni onn ono onr ons onx oo- ood ooi oon ooo oor oos oox or- ord ore ori orn oro orr ors orx os- osd ose osi osn oso osr oss osx ox- oxi oxn oxo oxx rdd rde rdi rdn rdo rdr rds rdx re- red ree rei ren reo rer res rex rid rie rii rin rio rir ris rix rnd rni rnn rno rnr rns rod roe roi ron roo ror ros rox rrd rri rrn rrr rrs rsd rse rsi rsn rso rsr rss rsx rxr rxs sdd sde sdi sdn sdo sdr sds se- sed see sei sen seo ser ses sex sid sie sii sin sio sir sis six snd sne sni snn sno snr sns sod soe soi son soo sor sos sox sr- srd sre sri srn sro srr srs srx ss- ssd sse ssi ssn sso ssr sss ssx sxi sxn sxs xde xdi xdr xds xed xee xen xer xes xex xie xii xin xio xis xix xno xns xod xoi xon xoo xor xos xox xrd xrx xsi xss xxi xxo xxx