b-r-k bbbee be-er bebek beber becke becue beebe beeke beene beken beker bekke bence bene- benke benne bennu benue benuk benun benur berbe berck bercu berec berek beren berk- berke berne berre berru berun beuer beure brebu brece breck breek breen breer breke brene brenk brenn brere breu- brrrr bruce bruck bruen bruer bruke brune brunk brunn bruun bubbe buben buber bucek bucku bucur buker bukk- buknu bunce bunke bunne bunuk bunun burck burcu burek buren burke burn- burne burru buruc buruk burun ccccc cebec ceber cecun ceene ceere cence ceneu cerbu cerc- cerce cerec ceren cerer cerke cerne cerre cneru cnnnn crebe crece creek creen creer creke cren- creu- creue crnce crnec crner cruce cruck cruke crune crunk crure cubbe cubeb cuber cubub cucuk cuker cunne curce curer curre ebber ebene ebern ebner ebure eccen ecker eecke eeeee eence eener ekene ekker ekren ekuku ekuru enbun encke encre encur enker enku enure enurn erbbe erben erber ereen erere erkec ernen eruke eucen eucre eurre kebbe kebek keben keber kecer keene keere kekec kenku kenne kerek keren kerne kernu kerre kneck kneen knuck knurr kreek kreke krenn kreuk krnce krunk kruun kubek kuben kuber kucer kucuk kukec kukur kunek kunen kuner kunku kunne kunur kurbu kurek kuren kurku kurne kurre kuruc kuruk ncree ncube nebek neber necke necr- neece neere neker neree nerre nerur neuck neuen neuer neueu neune neur- neure nkubu nnebe nu-nu nuker nunce nunun nurce nure- nurek nuruk nurun rebbe rebec reber rebun recce recen recke reckn recue recur reece reene reere reken rekke rekne rekun rence renee rener renke renku renne rere- reree rerun reuen reuer reune rubee ruben ruber rubke rucer ruere rueun ruken rukke runcu runec runer runne rurec u-cee ubeen uber- uceku ueken ukeke unken unker unkur unnun unnur unrun unurn urker urkun urubu uruce urucu uuuuu