-er -up ddd dde ddi ddp ddr dds ddt ddu de- ded dee dei dep der des det deu di- did die dii dip dir dis dit diu dpd dpe dpi dpp dpr dps dpt dpu drd dre dri drp drr drs drt dru dsd dse dsi dsp dsr dss dst dsu dtd dte dti dtp dtr dts dtt dtu dud due dui dup dur dus dut ed- edd ede edi edp edr eds edt edu eed eee eep eer ees eet eid eie eii eip eir eis eit eiu ep- epd epe epi epp epr eps ept epu erd ere eri erp err ers ert eru es- esd ese esi esp esr ess est esu etd ete eti etp etr ets ett etu eu- eud eue eui eup eur eus eut i-d idd ide idi idp idr ids idt idu ie- ied iee iei iep ier ies iet iid iie iii iip iir iis iit iiu ipd ipe ipi ipp ipr ips ipt ipu ir- ird ire iri irp irr irs irt iru is- isd ise isi isp isr iss ist isu itd ite iti itp its itt itu iu- iud iue iui iup iur ius iut p-p pdd pde pdi pdp pdr pds pdt pdu ped pee pei pep per pes pet peu pid pie pii pip pir pis pit piu ppd ppe ppi ppp ppr pps ppt ppu prd pre pri prp prr prs prt pru ps- psd pse psi psp psr pss pst psu pt- ptd pte pti ptp ptr pts ptt ptu pud pue pui pup pur pus put puu rdd rde rdi rdp rdr rds rdt rdu re- red ree rei rep rer res ret reu rid rie rii rip rir ris rit rpd rpe rpi rpp rpr rps rpt rpu rrd rri rrp rrr rrs rrt rru rsd rse rsi rsp rsr rss rst rsu rtd rte rti rtp rtr rts rtt rtu rud rue rui rup rur rus rut ruu sdd sde sdi sdp sdr sds sdt sdu se- sed see sei sep ser ses set seu sid sie sii sip sir sis sit siu spd spe spi spp spr sps spt spu sr- srd sre sri srp srr srs srt ss- ssd sse ssi ssp ssr sss sst ssu std ste sti stp str sts stt stu sud sue sui sup sur sus sut suu tdd tde tdi tdp tdr tds tdt tdu te- ted tee tei tep ter tes tet teu tid tie tii tip tir tis tit tiu tpd tpe tpi tpp tpr tps tpt tpu trd tre tri trp trr trs trt tru tsd tse tsi tsp tsr tss tst tsu ttd tte tti ttp ttr tts ttt ttu tud tue tui tup tur tus tut tuu udd ude udi udp udr uds udt udu ued uee uei uep uer ues uet uid uie uii uip uir uis uit uiu up- upd upe upi upp upr ups upt upu ur- urd ure uri urp urr urs urt uru usd use usi usp usr uss ust usu utd ute uti utp utr uts utt utu uue uur uus uut uuu