-ene bbbb bbeb bbpr bebb bebe beeb been beep beer bene benn bere bern berr bner bnpp bnrr breb bree bren brep brer brrr ebbr eben eber eeee enb- enbn enbr enee ener enne enp- epee epen eper eppp eprb eprp erbb erbe ereb eren erer erne erpe erre nber nbpp nebb nebe nebn nebr neeb neen neep neer nene nepe nepr nere nerr nnnn nnpr nren nrpn peen peep peer pen- pene penn pepe per- pere pern perp perr pnpp ppen pper pppn pppp pre- preb pree pren prep prnp rbbb rbbr rebb rebe reeb reen reep rene renn repe repp repr rere rnbr rppn rrrr