-er eee eef eep eer ees eet eex ef- efe eff efi efp efr efs eft efx eie eif eii eip eir eis eit eix ep- epe epf epi epp epr eps ept epx ere erf eri erp err ers ert es- ese esf esi esp esr ess est esx ete etf eti etp etr ets ett etx ex- exe exi exp exr exs ext exx fee fef fei fep fer fes fet fex ffe fff ffi ffp ffr ffs fft ffx fie fif fii fip fir fis fit fix fpe fpi fpp fpr fps fpt fpx fre frf fri frp frr frs frt fse fsf fsi fsp fsr fss fst fsx fte ftf fti ftp ftr fts ftt ftx fxe fxi fxp fxr fxs fxt fxx i-f ie- iee ief iei iep ier ies iet iex ife iff ifi ifp ifr ifs ift ifx iie iif iii iip iir iis iit iix ipe ipf ipi ipp ipr ips ipt ipx ir- ire irf iri irp irr irs irt irx is- ise isf isi isp isr iss ist ite itf iti itp its itt itx ixe ixi p-p pee pef pei pep per pes pet pex pfe pff pfi pfp pfr pfs pft pfx pie pif pii pip pir pis pit pix ppe ppf ppi ppp ppr pps ppt ppx pre prf pri prp prr prs prt prx ps- pse psf psi psp psr pss pst psx pt- pte ptf pti ptp ptr pts ptt ptx pxe pxr pxs pxt re- ree ref rei rep rer res ret rex rfe rff rfi rfp rfr rfs rft rie rif rii rip rir ris rit rix rpe rpf rpi rpp rpr rps rpt rpx rrf rri rrp rrr rrs rrt rse rsf rsi rsp rsr rss rst rsx rte rtf rti rtp rtr rts rtt rtx rxp rxr rxs se- see sef sei sep ser ses set sex sfe sff sfi sfp sfr sfs sft sfx sie sif sii sip sir sis sit six spe spf spi spp spr sps spt spx sr- sre srf sri srp srr srs srt srx ss- sse ssf ssi ssp ssr sss sst ssx ste stf sti stp str sts stt stx sxi sxs sxt t-x te- tee tef tei tep ter tes tet tex tfe tff tfi tfp tfr tfs tft tfx tie tif tii tip tir tis tit tix tpe tpf tpi tpp tpr tps tpt tpx tre trf tri trp trr trs trt trx tse tsf tsi tsp tsr tss tst tsx tte ttf tti ttp ttr tts ttt ttx txe txf txi txs txt xee xep xer xes xet xex xfe xfs xft xfx xie xii xis xit xix xpe xpf xpp xps xpt xrf xrt xrx xsi xsp xss xst xtf xti xtp xtr xts xtx xxi xxp xxx

eeee eees eefe eeps eers eese eesi eete eets eext efes efet effi effs efit efsi eft- eftp efts eiei eier eies eifs eipr eire eirs eise eiss eist eiti eitr epee eper epes epi- epie epip epis epit epix eppp epps eprp eprs epsf epsi epsp epss epsx epte epxp er-x erei erer eres eret erfs erft erfx erie eris erit erpe erps erre errs erse ersi erst erts esee eser eses eset esfp esfs esie esis esit espe espi espp esps esri esse essi essp esst este estp estr ests etee eter etes etfe etix etre etsi ette etti exer exes exif exis exit expr expt exrx exte extr exts feer fees feet fefe feff fefi feie feir feis feit feps fere ferr fers fert fese fess fest fete feti fetp fetr fets fett fext ffee ffff ffii ffps ffrr ffss fftf fief fier fies fife fiff fifi fift fiii fipp fips fire firs fise fisi fiss fist fite fiti fits fitt fixe fixt fixx fprf free frei frep fres fret frex frie frip fris frit frps frst fsfi fsix fspf fssf fssp fter ftii ftpe ftps ftrs ftse ftsr fxsp ieet ieie iere ieri iers iesi iesr iest ietf iett ifer ifes ifex ifis ifit ifps ifrf ifri ifsp iies iiie iiii iiis iiit iipf iirs iisi iisp iisr iist iitr iitt iper ipes ipet ipex ipie ipix ippf ippr ipri ipse ipsi ipsp ipss ipts ipxe iree irer ires irex irfe iri- irie irip iris irix irpe irps irre irri irrs irse irsf irsp irte irtf irti irtp irts isee isep iser ises iset isfp isie isis isit ispe ispf ispr isps isri isrp isse issf issi issp issr isss iste isti istp istr ists itep iter ites itet itex itie itif itis itrf itri itrs itse itsf itsi itsp ittf ixxi peep peer pees peet peff pefs peip peir peis peit pepe pepi peps per- pere perf peri perp perr pers pert pese pesi pess pest pete peti petr pets pett pfet pfff pffr pfft pfis pfit pfps pfte piep pier pies piet piff pifs piip pipe pipi pipp pips pire piri pirr pirs pise pisi piss pist pite pitf piti pitr pits pitt pitx pixx pper ppie ppif pppp ppps pprf ppsf ppss ppts pptt pre- pree pref prep pres pret prex prfs pri- prie prif prii pris prix prps prri prrs prse prsi prss prti prtp prtr psei psfs psip psis pspi pspp pspr psps psrp psse psst psts pter ptrf pxes reef reep rees reet refe reff refi refr refs reft reif reii reir reis reit repe repi repp repr reps rept rere reri rers rert rese resi resp ress rest rete reti retr rets rett rexx rfef rief riep rier ries riet riex rife riff rifs rift riif riis ripe ripi ripp ripr rips ript rire riri rirs rise risi risp riss rist rite riti rits ritt rixe rpet rpii rpix rpps rpts rrif rrrr rrsp rsee rsis rsps rsre rstp rsts rtee rtei rtes rtex rtps rtss rttp rtts rxes s-ii se-e se-f se-i se-s se-t se-x seef seep seer sees seet seex seff sefi seft seie seif seii seip seir seis