b-r-k bbbee be-er bebek beber beebe beeke beene beken beker bekke bene- benke benne bennu benue benuk benun benur berbe berek beren berk- berke berne berre berru berun beuer beure brebu breek breen breer breke brene brenk brenn brere breu- brrrr bruen bruer bruke brune brunk brunn bruun bubbe buben buber buker bukk- buknu bunke bunne bunuk bunun burek buren burke burn- burne burru buruk burun ebber ebene ebern ebner ebure eeeee eener ekene ekker ekren ekuku ekuru enbun enker enku enure enurn erbbe erben erber ereen erere ernen eruke eurre kebbe kebek keben keber keene keere kenku kenne kerek keren kerne kernu kerre kneen knurr kreek kreke krenn kreuk krunk kruun kubek kuben kuber kukur kunek kunen kuner kunku kunne kunur kurbu kurek kuren kurku kurne kurre kuruk nebek neber neere neker neree nerre nerur neuen neuer neueu neune neur- neure nkubu nnebe nu-nu nuker nunun nure- nurek nuruk nurun rebbe reber rebun reene reere reken rekke rekne rekun renee rener renke renku renne rere- reree rerun reuen reuer reune rubee ruben ruber rubke ruere rueun ruken rukke runer runne ubeen uber- ueken ukeke unken unker unkur unnun unnur unrun unurn urker urkun urubu uuuuu