-er ddd dde ddf ddi ddk ddm ddr dds ddt de- ded dee def dei dek dem der des det dfd dfe dff dfi dfk dfm dfr dfs dft di- did die dif dii dik dim dir dis dit dke dki dkk dkm dkr dks dkt dmd dme dmf dmi dmk dmm dmr dms dmt drd dre dri drk drm drr drs drt dsd dse dsf dsi dsk dsm dsr dss dst dtd dte dtf dti dtk dtm dtr dts dtt ed- edd ede edf edi edk edm edr eds edt eed eee eef eek eem eer ees eet ef- efd efe eff efi efm efr efs eft eid eie eif eii eik eim eir eis eit ekd eke ekf eki ekr eks ekt em- emd eme emf emi emk emm emr ems emt erd ere erf eri erk erm err ers ert es- esd ese esf esi esk esm esr ess est etd ete etf eti etk etm etr ets ett fdd fde fdf fdi fdk fdm fdr fds fdt fed fee fef fei fek fem fer fes fet ffd ffe fff ffi ffk ffm ffr ffs fft fid fie fif fii fik fim fir fis fit fkf fki fkk fkm fkt fmd fme fmf fmi fmm fmr fms fmt frd fre frf fri frk frm frr frs frt fsd fse fsf fsi fsk fsm fsr fss fst ftd fte ftf fti ftk ftm ftr fts ftt i-d i-f idd ide idf idi idk idm idr ids idt ie- ied iee ief iei iek iem ier ies iet ifd ife iff ifi ifm ifr ifs ift iid iie iif iii iim iir iis iit ike ikf iki ikk ikr iks ikt im- imd ime imf imi imm ims imt ir- ird ire irf iri irk irm irr irs irt is- isd ise isf isi isk ism isr iss ist itd ite itf iti itk itm its itt k-t kde kdf kdk kdm kdr kds kdt ke- ked kee kef kei kek kem ker kes ket kfd kff kfi kfm kfs kid kie kif kii kik kim kir kis kit kke kki kkk kkm kkr kks kkt kmd kme kmf kmi kmk kmm kms kmt krd krf kri krk krr krs krt ksd kse ksf ksi ksk ksm ksr kss kst kte ktf ktk ktm ktr kts ktt m-f m-r mdd mde mdf mdi mdk mdm mdr mds mdt med mee mef mei mek mem mer mes met mfd mfe mff mfi mfm mfr mfs mft mi- mid mie mif mii mik mim mir mis mit mkd mke mkk mkm mkr mks mkt mmd mme mmf mmi mmk mmm mmr mms mmt mrd mre mrf mri mrk mrm mrr mrs mrt msd mse msf msi msk msm msr mss mst mtd mte mtf mti mtk mtm mtr mts mtt rdd rde rdf rdi rdm rdr rds rdt re- red ree ref rei rek rem rer res ret rfd rfe rff rfi rfk rfm rfr rfs rft rid rie rif rii rik rim rir ris rit rke rkf rkk rkm rks rkt rmd rme rmf rmi rmm rmr rms rmt rrd rrf rri rrk rrm rrr rrs rrt rsd rse rsf rsi rsk rsm rsr rss rst rtd rte rtf rti rtk rtm rtr rts rtt sdd sde sdf sdi sdk sdm sdr sds sdt se- sed see sef sei sek sem ser ses set sfd sfe sff sfi sfk sfm sfr sfs sft sid sie sif sii sik sim sir sis sit sk- skd ske skf ski skk skm skr sks skt smd sme smf smi smk smm smr sms smt sr- srd sre srf sri srk srm srr srs srt ss- ssd sse ssf ssi ssk ssm ssr sss sst std ste stf sti stk stm str sts stt tdd tde tdf tdi tdk tdm tdr tds tdt te- ted tee tef tei tek tem ter tes tet tfd tfe tff tfi tfk tfm tfr tfs tft tid tie tif tii tik tim tir tis tit tke tkk tkm tkr tks tkt tmd tme tmf tmi tmk tmm tmr tms tmt trd tre trf tri trk trm trr trs trt tsd tse tsf tsi tsk tsm tsr tss tst ttd tte ttf tti ttk ttm ttr tts ttt