-er -up eee eef eeo eep eer ees eet ef- efe eff efo efp efr efs eft eo- eoe eof eoo eop eor eos eot eou ep- epe epf epo epp epr eps ept epu ere erf ero erp err ers ert eru es- ese esf eso esp esr ess est esu ete etf eto etp etr ets ett etu eu- eue euf eup eur eus eut fee fef feo fep fer fes fet feu ffe fff ffo ffp ffr ffs fft ffu foe fof foo fop for fos fot fou fpe fpo fpp fpr fps fpt fpu fre frf fro frp frr frs frt fru fse fsf fso fsp fsr fss fst fsu fte ftf fto ftp ftr fts ftt ftu fue fuf fuo fup fur fus fut fuu oee oef oeo oep oer oes oet of- ofe off ofo ofp ofr ofs oft ofu oo- oof ooo oop oor oos oot op- ope opf opo opp opr ops opt or- ore orf oro orp orr ors ort oru os- ose osf oso osp osr oss ost osu ot- ote otf oto otp otr ots ott otu ou- oue ouf ouo oup our ous out p-p pee pef peo pep per pes pet peu pfe pff pfo pfp pfr pfs pft pfu poe pof poo pop por pos pot pou ppe ppf ppo ppp ppr pps ppt ppu pre prf pro prp prr prs prt pru ps- pse psf pso psp psr pss pst psu pt- pte ptf pto ptp ptr pts ptt ptu pue puf pup pur pus put puu re- ree ref reo rep rer res ret reu rfe rff rfo rfp rfr rfs rft rfu roe rof roo rop ror ros rot rou rpe rpf rpo rpp rpr rps rpt rpu rrf rrp rrr rrs rrt rru rse rsf rso rsp rsr rss rst rsu rte rtf rto rtp rtr rts rtt rtu rue ruf ruo rup rur rus rut ruu se- see sef seo sep ser ses set seu sfe sff sfo sfp sfr sfs sft sfu soe sof soo sop sor sos sot sou spe spf spo spp spr sps spt spu sr- sre srf sro srp srr srs srt ss- sse ssf sso ssp ssr sss sst ssu ste stf sto stp str sts stt stu sue suf suo sup sur sus sut suu te- tee tef teo tep ter tes tet teu tfe tff tfo tfp tfr tfs tft tfu to- toe tof too top tor tos tot tou tpe tpf tpo tpp tpr tps tpt tpu tre trf tro trp trr trs trt tru tse tsf tso tsp tsr tss tst tsu tte ttf tto ttp ttr tts ttt ttu tue tuf tuo tup tur tus tut tuu uee uef uep uer ues uet ufe uff ufo ufp ufr ufs uft ufu uoe uoo uop uor uos uot up- upe upf upo upp upr ups upt upu ur- ure urf uro urp urr urs urt uru use usf uso usp usr uss ust usu ute utf uto utp utr uts utt utu uue uur uus uut uuu