-er eee eef eek eep eer ees ef- efe eff efi efp efr efs eie eif eii eik eip eir eis eke ekf eki ekp ekr eks ep- epe epf epi epp epr eps ere erf eri erk erp err ers es- ese esf esi esk esp esr ess fee fef fei fek fep fer fes ffe fff ffi ffk ffp ffr ffs fie fif fii fik fip fir fis fkf fki fkk fkp fpe fpi fpk fpp fpr fps fre frf fri frk frp frr frs fse fsf fsi fsk fsp fsr fss i-f ie- iee ief iei iek iep ier ies ife iff ifi ifp ifr ifs iie iif iii iip iir iis ike ikf iki ikk ikr iks ipe ipf ipi ipp ipr ips ir- ire irf iri irk irp irr irs is- ise isf isi isk isp isr iss ke- kee kef kei kek kep ker kes kff kfi kfs kie kif kii kik kip kir kis kke kki kkk kkp kkr kks kpe kpf kpi kpk kpp kpr kps krf kri krk krp krr krs kse ksf ksi ksk ksp ksr kss p-p pee pef pei pek pep per pes pfe pff pfi pfk pfp pfr pfs pie pif pii pik pip pir pis pke pkf pki pkp pkr pks ppe ppf ppi ppk ppp ppr pps pre prf pri prk prp prr prs ps- pse psf psi psk psp psr pss re- ree ref rei rek rep rer res rfe rff rfi rfk rfp rfr rfs rie rif rii rik rip rir ris rke rkf rkk rkp rks rpe rpf rpi rpk rpp rpr rps rrf rri rrk rrp rrr rrs rse rsf rsi rsk rsp rsr rss se- see sef sei sek sep ser ses sfe sff sfi sfk sfp sfr sfs sie sif sii sik sip sir sis sk- ske skf ski skk skp skr sks spe spf spi spk spp spr sps sr- sre srf sri srk srp srr srs ss- sse ssf ssi ssk ssp ssr sss

eeee eees eefe eeke eeks eeps eers eese eesi eesk efes effi effs efik efke efsi eiei eier eies eifs eike eiki eiks eipr eire eirs eise eisk eiss ekek eker ekes ekis ekki ekpe eksi epee eper epes epi- epie epik epip epis eppp epps eprp eprs epsf epsi epsp epss erei erer eres erfs erie erik eris erke erki erks erpe erps erre errs erse ersi esee esek eser eses esfp esfs esie esik esis eske esks espe espi espp esps esri esse essi essp f--k feek feer fees fefe feff fefi feie feir feis feke feps fere ferk ferr fers fese fess ffee ffff ffii ffps ffrr ffss fief fier fies fife fiff fifi fiii fike fiki fipp fips fire firk firs fise fisi fisk fiss fprf free frei frep fres frie frik frip fris frps fsfi fspf fssf fssp ieie iere ieri iers iesi iesr ifer ifes ifis ifps ifrf ifri ifsp iies iiie iiii iiis iipf iirs iisi iisp iisr ikee iker ikes ikki ikri ipek iper ipes ipie ipkf ippf ippr ipri ipse ipsi ipsp ipss iree irer ires irfe iri- irie irip iris irki irks irpe irps irre irri irrs irse irsf irsp isee isep iser ises isfp isie isis iskf ispe ispf ispr isps isri isrp isse issf issi issp issr isss keef keek keep keer kees keff kefr kefs keif keii keik keir keis keke keki keks kep- kepe kepi keps ker- kere kerf keri kerk kerp kerr kers kesi kesk kesp kesr kess kfer kfff kffk kfir kfis kfpr kfre kfri kfrp kfrr kfrs kfse kfsi kfsk kfsp kfsr kief kier kies kife kiff kifr kifs kiii kiik kiip kiis kikf kiki kikk kikr kip- kipe kipi kipp kipr kips kirf kiri kirk kirp kirr kirs kise kisf kisi kisk kisr kiss kkfi kkfr kkfs kkik kkkk kkpk kkps kkre kkrf kkrk kkrr kkrs kkse kksf kksi kksp kksr kkss kpek kper kpfk kpfr kpif kpir kpke kpkk kpkr kppk kppp kppr kpre kprf kpri kprk kprp kprr kprs kpsf kpsi kpsp kree kref krei krek kres krfe krff krfp krfs krik kris krke krki krkk krkr krks krpi krpr krps krre krrf krri krrk krrr krrs krse krsf krsk krsr krss ksee ksei ksek ksep kser ksfe ksfi ksfr ksif ksii ksik ksip ksir ksis kske kskf kskk kskr ksks kspe kspi kspk kspr ksps ksrf ksrp ksrr ksrs ksse kssi kssr ksss peek peep peer pees peff pefs peip peir peis peke peki pekk pepe pepi peps per- pere perf peri perk perp perr pers pese pesi pess pfff pffr pfis pfkp pfps piep pier pies piff pifs piip pike piki pikk piks pipe pipi pipp pips pire piri pirk pirr pirs pise pisi pisk piss pper ppie ppif pppp ppps pprf ppsf ppss pre- pree pref prek prep pres prfs pri- prie prif prii pris prps prri prrs prse prsi prss psei psfk psfs psip psis pspi pspp pspr psps psrk psrp psse reef reek reep rees refe reff refi refr refs reif reii reik reir reis reke reki reks repe repi repp repr reps rere reri rers rese resi resp ress rfef rief riek riep rier ries rife riff rifs riif riis rike riki rikk ripe ripi ripp ripr rips rire riri rirs rise risi risk risp riss rkkf rkss rpii rpps rrif rrrr rrsp rsee rsis rspk rsps rsre s-ii se-e se-f se-i se-k se-s seef seek seep seer sees seff sefi seie seif seii seik seip seir seis seke seki sekk sepe sepi sepp sepr seps sere serf seri serk serp serr sers sese sesi sess sfer sfss sief siek sier sies sife siff sifr siik sike siki sikr siks sipe sipi sipp sips sire sirf siri sirk sirp sirr sirs sise sisi sisk siss skee skei skep sker skes skie skif skik skip skir skis skss spee spef spek sper spes spfs spie spik spip spir spis spke spkr sppf spps spri sprs spse spsp spss