-er c-- ccc ccd cce ccf ccm cco ccr ccs cct cdc cdd cde cdf cdm cdo cdr cds cdt ce- cec ced cee cef cem ceo cer ces cet cfc cfd cfe cff cfm cfo cfr cfs cft cmc cmd cme cmf cmm cmo cmr cms cmt co- coc cod coe cof com coo cor cos cot crc crd cre crf crm cro crr crs crt csc csd cse csf csm cso csr css cst ctc ctd cte ctf ctm cto ctr cts ctt dcc dcd dce dcf dcm dco dcr dcs dct ddc ddd dde ddf ddm ddo ddr dds ddt de- dec ded dee def dem deo der des det dfc dfd dfe dff dfm dfo dfr dfs dft dmc dmd dme dmf dmm dmo dmr dms dmt doc dod doe dof dom doo dor dos dot drc drd dre drm dro drr drs drt dsc dsd dse dsf dsm dso dsr dss dst dtc dtd dte dtf dtm dto dtr dts dtt ec- ecc ecd ece ecf ecm eco ecr ecs ect ed- edc edd ede edf edm edo edr eds edt eec eed eee eef eem eeo eer ees eet ef- efc efd efe eff efm efo efr efs eft em- emc emd eme emf emm emo emr ems emt eo- eoc eod eoe eof eom eoo eor eos eot erc erd ere erf erm ero err ers ert es- esc esd ese esf esm eso esr ess est etc etd ete etf etm eto etr ets ett fcc fcd fce fcf fcm fco fcr fcs fct fdc fdd fde fdf fdm fdo fdr fds fdt fec fed fee fef fem feo fer fes fet ffc ffd ffe fff ffm ffo ffr ffs fft fmc fmd fme fmf fmm fmo fmr fms fmt foc foe fof fom foo for fos fot frc frd fre frf frm fro frr frs frt fsc fsd fse fsf fsm fso fsr fss fst ftc ftd fte ftf ftm fto ftr fts ftt m-f m-o m-r mc- mcc mcd mce mcf mcm mco mcr mcs mct mdc mdd mde mdf mdm mdo mdr mds mdt mec med mee mef mem meo mer mes met mfc mfd mfe mff mfm mfo mfr mfs mft mmc mmd mme mmf mmm mmo mmr mms mmt moc mod moe mof mom moo mor mos mot mrc mrd mre mrf mrm mro mrr mrs mrt msc msd mse msf msm mso msr mss mst mtc mtd mte mtf mtm mto mtr mts mtt oc- occ ocd ocf ocm oco ocr ocs oct odc odd ode odf odm odo odr ods odt oec oed oee oef oem oeo oer oes oet of- ofc ofd ofe off ofm ofo ofr ofs oft om- omc omd ome omf omm omo omr oms omt oo- ooc ood oof oom ooo oor oos oot or- orc ord ore orf orm oro orr ors ort os- osc osd ose osf osm oso osr oss ost ot- otc otd ote otf otm oto otr ots ott rcc rcd rce rcf rcm rco rcr rcs rct rdc rdd rde rdf rdm rdo rdr rds rdt re- rec red ree ref rem reo rer res ret rfc rfd rfe rff rfm rfo rfr rfs rft rmc rmd rme rmf rmm rmo rmr rms rmt roc rod roe rof rom roo ror ros rot rrc rrd rrf rrm rrr rrs rrt rsc rsd rse rsf rsm rso rsr rss rst rtc rtd rte rtf rtm rto rtr rts rtt scc scd sce scf scm sco scr scs sct sdc sdd sde sdf sdm sdo sdr sds sdt se- sec sed see sef sem seo ser ses set sfc sfd sfe sff sfm sfo sfr sfs sft smc smd sme smf smm smo smr sms smt soc sod soe sof som soo sor sos sot sr- src srd sre srf srm sro srr srs srt ss- ssc ssd sse ssf ssm sso ssr sss sst stc std ste stf stm sto str sts stt tcc tcd tce tcf tcm tco tcr tcs tct tdc tdd tde tdf tdm tdo tdr tds tdt te- tec ted tee tef tem teo ter tes tet tfc tfd tfe tff tfm tfo tfr tfs tft tmc tmd tme tmf tmm tmo tmr tms tmt to- toc tod toe tof tom too tor tos tot trc trd tre trf trm tro trr trs trt tsc tsd tse tsf tsm tso tsr tss tst ttc ttd tte ttf ttm tto ttr tts ttt