ddd ddf ddm ddo ddr dds ddt dfd dff dfm dfo dfr dfs dft dmd dmf dmm dmo dmr dms dmt dod dof dom doo dor dos dot drd drm dro drr drs drt dsd dsf dsm dso dsr dss dst dtd dtf dtm dto dtr dts dtt fdd fdf fdm fdo fdr fds fdt ffd fff ffm ffo ffr ffs fft fmd fmf fmm fmo fmr fms fmt fof fom foo for fos fot frd frf frm fro frr frs frt fsd fsf fsm fso fsr fss fst ftd ftf ftm fto ftr fts ftt m-f m-o m-r mdd mdf mdm mdo mdr mds mdt mfd mff mfm mfo mfr mfs mft mmd mmf mmm mmo mmr mms mmt mod mof mom moo mor mos mot mrd mrf mrm mro mrr mrs mrt msd msf msm mso msr mss mst mtd mtf mtm mto mtr mts mtt odd odf odm odo odr ods odt of- ofd off ofm ofo ofr ofs oft om- omd omf omm omo omr oms omt oo- ood oof oom ooo oor oos oot or- ord orf orm oro orr ors ort os- osd osf osm oso osr oss ost ot- otd otf otm oto otr ots ott rdd rdf rdm rdo rdr rds rdt rfd rff rfm rfo rfr rfs rft rmd rmf rmm rmo rmr rms rmt rod rof rom roo ror ros rot rrd rrf rrm rrr rrs rrt rsd rsf rsm rso rsr rss rst rtd rtf rtm rto rtr rts rtt sdd sdf sdm sdo sdr sds sdt sfd sff sfm sfo sfr sfs sft smd smf smm smo smr sms smt sod sof som soo sor sos sot sr- srd srf srm sro srr srs srt ss- ssd ssf ssm sso ssr sss sst std stf stm sto str sts stt tdd tdf tdm tdo tdr tds tdt tfd tff tfm tfo tfr tfs tft tmd tmf tmm tmo tmr tms tmt to- tod tof tom too tor tos tot trd trf trm tro trr trs trt tsd tsf tsm tso tsr tss tst ttd ttf ttm tto ttr tts ttt