-er -up ddd dde ddn ddp ddr dds ddt ddu de- ded dee den dep der des det deu dnd dne dnn dnp dnr dns dnt dpd dpe dpn dpp dpr dps dpt dpu drd dre drn drp drr drs drt dru dsd dse dsn dsp dsr dss dst dsu dtd dte dtn dtp dtr dts dtt dtu dud due dun dup dur dus dut ed- edd ede edn edp edr eds edt edu eed eee een eep eer ees eet en- end ene enn enp enr ens ent enu ep- epd epe epn epp epr eps ept epu erd ere ern erp err ers ert eru es- esd ese esn esp esr ess est esu etd ete etn etp etr ets ett etu eu- eud eue eun eup eur eus eut ndd nde ndn ndp ndr nds ndt ndu ne- ned nee nen nep ner nes net neu nne nnn nnp nns nnt nnu npd npe npn npp npr nps npt npu nrd nre nrn nrp nrr nrs nrt nru nsd nse nsn nsp nsr nss nst nsu ntd nte ntn ntp ntr nts ntt ntu nud nue nun nup nur nus nut nuu p-p pdd pde pdn pdp pdr pds pdt pdu ped pee pen pep per pes pet peu pn- pnd pne pnn pnp pnr pns pnt pnu ppd ppe ppn ppp ppr pps ppt ppu prd pre prn prp prr prs prt pru ps- psd pse psn psp psr pss pst psu pt- ptd pte ptn ptp ptr pts ptt ptu pud pue pun pup pur pus put puu rdd rde rdn rdp rdr rds rdt rdu re- red ree ren rep rer res ret reu rnd rnn rnp rnr rns rnt rnu rpd rpe rpn rpp rpr rps rpt rpu rrd rrn rrp rrr rrs rrt rru rsd rse rsn rsp rsr rss rst rsu rtd rte rtn rtp rtr rts rtt rtu rud rue run rup rur rus rut ruu sdd sde sdn sdp sdr sds sdt sdu se- sed see sen sep ser ses set seu snd sne snn snp snr sns snt snu spd spe spn spp spr sps spt spu sr- srd sre srn srp srr srs srt ss- ssd sse ssn ssp ssr sss sst ssu std ste stn stp str sts stt stu sud sue sun sup sur sus sut suu tdd tde tdn tdp tdr tds tdt tdu te- ted tee ten tep ter tes tet teu tnd tne tnn tnp tnr tns tnt tpd tpe tpn tpp tpr tps tpt tpu trd tre trn trp trr trs trt tru tsd tse tsn tsp tsr tss tst tsu ttd tte ttn ttp ttr tts ttt ttu tud tue tun tup tur tus tut tuu udd ude udn udp udr uds udt udu ued uee uen uep uer ues uet un- und une unn unp unr uns unt unu up- upd upe upn upp upr ups upt upu ur- urd ure urn urp urr urs urt uru usd use usn usp usr uss ust usu utd ute utn utp utr uts utt utu uue uun uur uus uut uuu