eeee eees eefe eeps eers eese eesi efes effi effs efsi eiei eier eies eifs eipr eire eirs eise eiss epee eper epes epi- epie epip epis eppp epps eprp eprs epsf epsi epsp epss epus erei erer eres erfs erie eris eriu erpe erps erre errs erse ersi erur erus esee eser eses esfp esfs esie esis espe espi espp esps esri esse essi essp essu esuf esui esus euer eufi eur- eure euse feer fees fefe feff fefi feie feir feis feps fere ferr fers feru fese fess feus ffee ffff ffii ffps ffrr ffss fief fier fies fife fiff fifi fiii fipp fips fire firs fise fisi fiss fisu fprf free frei frep fres frie frip fris frps frue fsfi fspf fssf fssp fuff fufu fuir fur- fure furi furr furs fuse fusi fuss fusu ieie iere ieri iers iesi iesr iesu ifer ifes ifis ifps ifrf ifri ifsp iies iiie iiii iiis iipf iirs iisi iisp iisr iisu iper ipes ipie ippf ippr ipri ipse ipsi ipsp ipss ipur ipus iree irer ires irfe irfu iri- irie irip iris irpe irps irre irri irrs irse irsf irsp irus isee isep iser ises isfp isie isis ispe ispf ispr isps isri isrp isse issf issi issp issr isss issu isup isus iuef iuiu iupp iuse iuss peep peer pees peff pefs peip peir peis pepe pepi peps per- pere perf peri perp perr pers peru pese pesi pess pesu peur pfff pffr pfis pfps pfui piep pier pies piff pifs piip pipe pipi pipp pips pire piri pirr pirs piru pise pisi piss pisu pius pper ppie ppif pppp ppps pprf ppru ppsf ppss ppur pre- pree pref prep pres preu prfs pri- prie prif prii pris prps prri prrs prse prsi prss prue pruf prus pruu psei psfs psip psis pspi pspp pspr psps psrp psse pu-e puer pueu puff puir puis puiu pupe pupi pups pupu pur- pure puri purp purr purs puru pusi puss reef reep rees refe reff refi refr refs refu reif reii reir reis reiu repe repi repp repr reps repu rere reri rers reru rese resi resp ress reue reuf reup reus reuu rfef rief riep rier ries rieu rife riff rifs rifu riif riis ripe ripi ripp ripr rips rire riri rirs rise risi risp riss risu riue rius rpii rpps rrif rrrr rrsp rsee rsis rsps rsre ruer rues rufe ruff ruif ruis rupe rupp rure ruri rurp rurs ruru ruse rusi russ rusu s-ii se-e se-f se-i se-s se-u seef seep seer sees seeu seff sefi seie seif seii seip seir seis seiu sepe sepi sepp sepr seps sepu sere serf seri serp serr sers seru sese sesi sess seui seur sfer sfss sfsu sief sier sies sife siff sifr sifu sipe sipi sipp sips sire sirf siri sirp sirr sirs siru sise sisi siss sisu siue siui sius spee spef sper spes spfs spie spip spir spis sppf spps spri sprs spse spsp spss spue spui spur spus sres srfi sris srps srsp ssee ssep sses ssfp ssis sspe sspf ssps ssri ssrs sssf sssi ssss suee suer sues sueu suf- suff sufi sufr sufs sufu suie suir suis sup- supe supp supr sups sur- sure surf suri surp surr surs suru sus- suse susi susp suss susu suus u-ie u-rp ueir uepi uers uess ufer uffe ufip uies uipi uirr uise upie upis uppe uppp uppu upri upse upsi upup ure- ures urfe urff urfi urie urif uris uriu urre urri urse ursi urss ursu urup urur urus usee usef user uses usfi usfs usie usif usip usis uspp usps usse ussf ussr usss ussu usui usus uuri uusi uuuu