eeeee eener efere effer efren efuru ekene ekker ekren ekuku ekuru enfer enfeu enker enku enuff enure enurn ereen erere ernen eruke eurre feere fenek fener feneu fenne feren ferr- ferre feuer freek freer freke frenk frere freur fu-fu funen funke furen keefe keene keere kefee kenku kenne kerek keren kerne kernu kerre kneen knuff knurr kreef kreek kreke krenn kreuk krunk kruun kukur kunek kunen kuner kunku kunne kunur kurek kuren kurku kurne kurre kuruk neere nefen nefer neffe nefre neker neree nerre nerur neuen neuer neueu neune neur- neure nu-nu nuker nunun nure- nurek nuruk nurun reefe reene reere refen refer reffe refne reken rekke rekne rekun renee rener renfe renke renku renne rere- reree rerun reuen reuer reune ruere rueun ruffe ruken rukke runer runne ueken ufere ukeke unfun unfur unken unker unkur unnun unnur unref unrun unurn urker urkun uuuuu