ddd ddm ddo ddp ddr dds ddt dmd dmm dmo dmp dmr dms dmt dod dom doo dop dor dos dot dpd dpm dpo dpp dpr dps dpt drd drm dro drp drr drs drt dsd dsm dso dsp dsr dss dst dtd dtm dto dtp dtr dts dtt m-o m-r mdd mdm mdo mdp mdr mds mdt mmd mmm mmo mmp mmr mms mmt mod mom moo mop mor mos mot mpd mpm mpo mpp mpr mps mpt mrd mrm mro mrp mrr mrs mrt msd msm mso msp msr mss mst mtd mtm mto mtp mtr mts mtt odd odm odo odp odr ods odt om- omd omm omo omp omr oms omt oo- ood oom ooo oop oor oos oot op- opd opm opo opp opr ops opt or- ord orm oro orp orr ors ort os- osd osm oso osp osr oss ost ot- otd otm oto otp otr ots ott p-p pdd pdm pdo pdp pdr pds pdt pmd pmm pmo pmp pmr pms pmt pod pom poo pop por pos pot ppd ppm ppo ppp ppr pps ppt prd prm pro prp prr prs prt ps- psd psm pso psp psr pss pst pt- ptd ptm pto ptp ptr pts ptt rdd rdm rdo rdp rdr rds rdt rmd rmm rmo rmp rmr rms rmt rod rom roo rop ror ros rot rpd rpm rpo rpp rpr rps rpt rrd rrm rrp rrr rrs rrt rsd rsm rso rsp rsr rss rst rtd rtm rto rtp rtr rts rtt sdd sdm sdo sdp sdr sds sdt smd smm smo smp smr sms smt sod som soo sop sor sos sot spd spm spo spp spr sps spt sr- srd srm sro srp srr srs srt ss- ssd ssm sso ssp ssr sss sst std stm sto stp str sts stt tdd tdm tdo tdp tdr tds tdt tmd tmm tmo tmp tmr tms tmt to- tod tom too top tor tos tot tpd tpm tpo tpp tpr tps tpt trd trm tro trp trr trs trt tsd tsm tso tsp tsr tss tst ttd ttm tto ttp ttr tts ttt