-er -up eee eep eer ees eet eie eii eip eir eis eit eiu ep- epe epi epp epq epr eps ept epu eqe eqp eqq eqs eqt equ ere eri erp erq err ers ert eru es- ese esi esp esq esr ess est esu ete eti etp etr ets ett etu eu- eue eui eup eur eus eut ie- iee iei iep ier ies iet iie iii iip iir iis iit iiu ipe ipi ipp ipr ips ipt ipu iqe iqs iqt iqu ir- ire iri irp irq irr irs irt iru is- ise isi isp isq isr iss ist isu ite iti itp itq its itt itu iu- iue iui iup iur ius iut p-p pee pei pep per pes pet peu pie pii pip piq pir pis pit piu ppe ppi ppp ppq ppr pps ppt ppu pqi pqq pqr pqs pre pri prp prq prr prs prt pru ps- pse psi psp psr pss pst psu pt- pte pti ptp ptq ptr pts ptt ptu pue pui pup pur pus put puu qee qep qet qie qip qir qis qit qiu qpp qpr qps qqq qqu qre qri qrp qrs qrt qru qsi qsp qsr qst qti qtq qtr qts qu- que qui qur qus qut re- ree rei rep req rer res ret reu rie rii rip riq rir ris rit rpe rpi rpp rpr rps rpt rpu rqs rri rrp rrq rrr rrs rrt rru rse rsi rsp rsq rsr rss rst rsu rte rti rtp rtq rtr rts rtt rtu rue rui rup rur rus rut ruu se- see sei sep seq ser ses set seu sie sii sip siq sir sis sit siu spe spi spp spq spr sps spt spu sqi sqq sqr sqs sr- sre sri srp srq srr srs srt ss- sse ssi ssp ssq ssr sss sst ssu ste sti stp stq str sts stt stu sue sui sup suq sur sus sut suu te- tee tei tep teq ter tes tet teu tie tii tip tir tis tit tiu tpe tpi tpp tpq tpr tps tpt tpu tre tri trp trq trr trs trt tru tse tsi tsp tsq tsr tss tst tsu tte tti ttp ttr tts ttt ttu tue tui tup tur tus tut tuu uee uei uep uer ues uet uie uii uip uiq uir uis uit uiu up- upe upi upp upr ups upt upu ur- ure uri urp urr urs urt uru use usi usp usr uss ust usu ute uti utp utr uts utt utu uue uur uus uut uuu