-er ddd dde ddi ddk ddn ddr dds ddt ddx de- ded dee dei dek den der des det dex di- did die dii dik din dir dis dit dix dke dki dkk dkr dks dkt dkx dnd dne dni dnk dnn dnr dns dnt drd dre dri drk drn drr drs drt drx dsd dse dsi dsk dsn dsr dss dst dsx dtd dte dti dtk dtn dtr dts dtt dtx dxd dxi dxn dxr dxs dxt dxx ed- edd ede edi edk edn edr eds edt edx eed eee eek een eer ees eet eex eid eie eii eik ein eir eis eit eix ekd eke eki ekr eks ekt en- end ene eni enk enn enr ens ent erd ere eri erk ern err ers ert es- esd ese esi esk esn esr ess est esx etd ete eti etk etn etr ets ett etx ex- exd exe exi exr exs ext exx i-d idd ide idi idk idn idr ids idt idx ie- ied iee iei iek ien ier ies iet iex iid iie iii iin iir iis iit iix ike iki ikk ikr iks ikt ikx in- ind ine ini ink inn inr ins int inx ir- ird ire iri irk irn irr irs irt irx is- isd ise isi isk isn isr iss ist itd ite iti itk itn its itt itx ixe ixi ixn k-t kde kdk kdr kds kdt kdx ke- ked kee kei kek ken ker kes ket kex kid kie kii kik kin kir kis kit kix kke kki kkk kkn kkr kks kkt kn- knd kne kni knk knn knr knt knx krd kri krk krn krr krs krt ksd kse ksi ksk ksn ksr kss kst kte ktk ktn ktr kts ktt n-i ndd nde ndi ndk ndn ndr nds ndt ne- ned nee nei nek nen ner nes net nex nid nie nii nik nin nir nis nit nix nke nki nkk nkn nkr nks nkt nne nni nnk nnn nns nnt nrd nre nri nrk nrn nrr nrs nrt nrx nsd nse nsi nsk nsn nsr nss nst nsx ntd nte nti ntk ntn ntr nts ntt ntx nxd nxt rdd rde rdi rdn rdr rds rdt rdx re- red ree rei rek ren rer res ret rex rid rie rii rik rin rir ris rit rix rke rkk rks rkt rnd rni rnn rnr rns rnt rrd rri rrk rrn rrr rrs rrt rsd rse rsi rsk rsn rsr rss rst rsx rtd rte rti rtk rtn rtr rts rtt rtx rxr rxs sdd sde sdi sdk sdn sdr sds sdt se- sed see sei sek sen ser ses set sex sid sie sii sik sin sir sis sit six sk- skd ske ski skk skr sks skt skx snd sne sni snk snn snr sns snt sr- srd sre sri srk srn srr srs srt srx ss- ssd sse ssi ssk ssn ssr sss sst ssx std ste sti stk stn str sts stt stx sxi sxn sxs sxt t-x tdd tde tdi tdk tdn tdr tds tdt tdx te- ted tee tei tek ten ter tes tet tex tid tie tii tik tin tir tis tit tix tke tkk tkr tks tkt tnd tne tni tnk tnn tnr tns tnt tnx trd tre tri trk trn trr trs trt trx tsd tse tsi tsk tsn tsr tss tst tsx ttd tte tti ttk ttn ttr tts ttt ttx txe txi txk txn txs txt xde xdi xdk xdr xds xdt xed xee xen xer xes xet xex xie xii xin xis xit xix xke xks xnk xns xrd xrt xrx xsi xss xst xti xtr xts xtx xxi xxx