-er -up ddd dde ddm ddp ddr dds ddt ddu de- ded dee dem dep der des det deu dmd dme dmm dmp dmr dms dmt dmu dpd dpe dpm dpp dpr dps dpt dpu drd dre drm drp drr drs drt dru dsd dse dsm dsp dsr dss dst dsu dtd dte dtm dtp dtr dts dtt dtu dud due dum dup dur dus dut ed- edd ede edm edp edr eds edt edu eed eee eem eep eer ees eet em- emd eme emm emp emr ems emt emu ep- epd epe epm epp epr eps ept epu erd ere erm erp err ers ert eru es- esd ese esm esp esr ess est esu etd ete etm etp etr ets ett etu eu- eud eue eup eur eus eut m-r mdd mde mdm mdp mdr mds mdt mdu med mee mem mep mer mes met meu mmd mme mmm mmp mmr mms mmt mmu mpd mpe mpm mpp mpr mps mpt mpu mrd mre mrm mrp mrr mrs mrt mru msd mse msm msp msr mss mst msu mtd mte mtm mtp mtr mts mtt mtu mud mue mum mup mur mus mut muu p-p pdd pde pdm pdp pdr pds pdt pdu ped pee pem pep per pes pet peu pmd pme pmm pmp pmr pms pmt pmu ppd ppe ppm ppp ppr pps ppt ppu prd pre prm prp prr prs prt pru ps- psd pse psm psp psr pss pst psu pt- ptd pte ptm ptp ptr pts ptt ptu pud pue pum pup pur pus put puu rdd rde rdm rdp rdr rds rdt rdu re- red ree rem rep rer res ret reu rmd rme rmm rmp rmr rms rmt rpd rpe rpm rpp rpr rps rpt rpu rrd rrm rrp rrr rrs rrt rru rsd rse rsm rsp rsr rss rst rsu rtd rte rtm rtp rtr rts rtt rtu rud rue rum rup rur rus rut ruu sdd sde sdm sdp sdr sds sdt sdu se- sed see sem sep ser ses set seu smd sme smm smp smr sms smt smu spd spe spm spp spr sps spt spu sr- srd sre srm srp srr srs srt ss- ssd sse ssm ssp ssr sss sst ssu std ste stm stp str sts stt stu sud sue sum sup sur sus sut suu tdd tde tdm tdp tdr tds tdt tdu te- ted tee tem tep ter tes tet teu tmd tme tmm tmp tmr tms tmt tmu tpd tpe tpm tpp tpr tps tpt tpu trd tre trm trp trr trs trt tru tsd tse tsm tsp tsr tss tst tsu ttd tte ttm ttp ttr tts ttt ttu tud tue tum tup tur tus tut tuu udd ude udm udp udr uds udt udu ued uee uem uep uer ues uet um- umd ume umm ump umr ums umt umu up- upd upe upm upp upr ups upt upu ur- urd ure urm urp urr urs urt uru usd use usm usp usr uss ust usu utd ute utm utp utr uts utt utu uue uum uur uus uut uuu