-er eee eef eeo eer ef- efe eff efo efr eo- eoe eof eoo eor eou ere erf ero err eru eu- eue euf eur fee fef feo fer feu ffe fff ffo ffr ffu foe fof foo for fou fre frf fro frr fru fue fuf fuo fur fuu oee oef oeo oer of- ofe off ofo ofr ofu oo- oof ooo oor or- ore orf oro orr oru ou- oue ouf ouo our re- ree ref reo rer reu rfe rff rfo rfr rfu roe rof roo ror rou rrf rrr rru rue ruf ruo rur ruu uee uef uer ufe uff ufo ufr ufu uoe uoo uor ur- ure urf uro urr uru uue uur uuu

eeee eefe eero efeo efor eore erer eroe eroo erre erro erur euer eur- eure euro feer fefe feff fefo feof fere fero ferr feru ffee ffff ffrr foer fofo foof for- fore foro forr four free freo froe frou frue fuff fufu fuor fur- fure furo furr o-eo oere oeuf ofer off- offe offo offr offu ofor ofre ooer ooff oooo oore ore- oreo orer orfe orff orfu oro- oroe orof oror orro ouer oufe ouff our- oure ouro ouu- reef refe reff refr refu reof reou rere rero reru reue reuf reuu rfef roer rofe roff rofo roof roor rore roro roru roue rouf rrrr ruer rufe ruff rufo rure ruro ruru ufer uffe uofo uor- uore ure- urfe urff uro- uroo urre urur uuuu

eeeee efere effer efore efuru eofor eorre erere eroor erore error euro- eurre feeor feere fefor feoff ferr- ferre ferro feuer foore fore- foreo forro forur fouee fouro freer frere freur frore fu-fu fuero furo- furor o-fer offer offof offre ofour oo-er ooooo oreo- orere orero orfeo orfeu orfoe orfor oroer oruro ouoro oure- reefe reere refer reffe reffo rere- reree reuer ro-ro roero roffe rofor rooer roofe roore rooue rorer rouer roufe roure ruere ruffe ruffo rufo- ufere ufofu uouee ureo- urour uuuuu

e-four effere effoff effore errour eururo feeror feofor ferfer ferrer ferro- ferrur foerre foofoo foofur forrer forure foufou fourer fourof fourou freeof frefre freure froofe fufore furfur furore furour furrer furrfu oferre oooooo orrour ouerre reefer reeffe refeff reroof reuere reuour roofer rouffe ruffer urouer uroure uruffe

eeeroer errorof eurofor feoffee feoffer feoffor ferrere ferrero ferrour ferrure foo-foo for-rue forfere forfree fou-fou freefor furrour furrure off-off offeree offerer offeror orrouer ourouer refeoff referee referer reoffer rerefer

feeoffee forereef fourree froufrou referree referrer

errorfree four-four frou-frou