ddd ddm ddn ddr dds ddt dmd dmm dmn dmr dms dmt dnd dnm dnn dnr dns dnt drd drm drn drr drs drt dsd dsm dsn dsr dss dst dtd dtm dtn dtr dts dtt m-r mdd mdm mdn mdr mds mdt mmd mmm mmn mmr mms mmt mnm mnn mnr mns mnt mrd mrm mrn mrr mrs mrt msd msm msn msr mss mst mtd mtm mtn mtr mts mtt ndd ndm ndn ndr nds ndt nmd nmm nmn nmr nms nmt nnm nnn nns nnt nrd nrm nrn nrr nrs nrt nsd nsm nsn nsr nss nst ntd ntm ntn ntr nts ntt rdd rdm rdn rdr rds rdt rmd rmm rmn rmr rms rmt rnd rnm rnn rnr rns rnt rrd rrm rrn rrr rrs rrt rsd rsm rsn rsr rss rst rtd rtm rtn rtr rts rtt sdd sdm sdn sdr sds sdt smd smm smn smr sms smt snd snm snn snr sns snt sr- srd srm srn srr srs srt ss- ssd ssm ssn ssr sss sst std stm stn str sts stt tdd tdm tdn tdr tds tdt tmd tmm tmn tmr tms tmt tnd tnm tnn tnr tns tnt trd trm trn trr trs trt tsd tsm tsn tsr tss tst ttd ttm ttn ttr tts ttt