-er -up ddd dde ddi ddp ddq ddr dds ddt ddu de- ded dee dei dep deq der des det deu di- did die dii dip diq dir dis dit diu dpd dpe dpi dpp dpr dps dpt dpu dqe dqs drd dre dri drp drq drr drs drt dru dsd dse dsi dsp dsq 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 epq epr eps ept epu eqe eqp eqq eqs eqt equ erd ere eri erp erq err ers ert eru es- esd ese esi esp esq 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 idq 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 iqd iqe iqs iqt iqu ir- ird ire iri irp irq irr irs irt iru is- isd ise isi isp isq isr iss ist isu itd ite iti itp itq its itt itu iu- iud iue iui iup iur ius iut p-p pdd pde pdi pdp pdq pdr pds pdt pdu ped pee pei pep per pes pet peu pid pie pii pip piq pir pis pit piu ppd ppe ppi ppp ppq ppr pps ppt ppu pqi pqq pqr pqs prd pre pri prp prq prr prs prt pru ps- psd pse psi psp psr pss pst psu pt- ptd pte pti ptp ptq ptr pts ptt ptu pud pue pui pup pur pus put puu qdr qds qdt qed qee qep qet qid qie qip qir qis qit qiu qpp qpr qps qqq qqu qre qri qrp qrs qrt qru qsd qsi qsp qsr qst qtd qti qtq qtr qts qu- qud que qui qur qus qut rdd rde rdi rdp rdr rds rdt rdu re- red ree rei rep req rer res ret reu rid rie rii rip riq rir ris rit rpd rpe rpi rpp rpr rps rpt rpu rqs rrd rri rrp rrq rrr rrs rrt rru rsd rse rsi rsp rsq rsr rss rst rsu rtd rte rti rtp rtq rtr rts rtt rtu rud rue rui rup rur rus rut ruu sdd sde sdi sdp sdq sdr sds sdt sdu se- sed see sei sep seq ser ses set seu sid sie sii sip siq sir sis sit siu spd spe spi spp spq spr sps spt spu sqd sqi sqq sqr sqs sr- srd sre sri srp srq srr srs srt ss- ssd sse ssi ssp ssq ssr sss sst ssu std ste sti stp stq str sts stt stu sud sue sui sup suq sur sus sut suu tdd tde tdi tdp tdr tds tdt tdu te- ted tee tei tep teq ter tes tet teu tid tie tii tip tir tis tit tiu tpd tpe tpi tpp tpq tpr tps tpt tpu trd tre tri trp trq trr trs trt tru tsd tse tsi tsp tsq 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 uiq 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