bbbbbb beebee beiber berbee berbeo berber berere berour berrer berrie berube beruri beurre bibber bibiri bibiru bieber biobor biribi birori bobber bobbie bobbio bobiri boeber boerre boober boobie booboo booue borbor borebi borier borore bororo boubou boueer bouree bourou bourre breere breuer bribe- bribee briber bribir bribri brubru bruree bubber bubbio bububu burbur burier burior buriro burree burrer burrie burrio bururi ebr-ii ebrie eburru eebree eerier erbree errori errour euerie eururo i-bere i-bure ibero- ibibio ier-oe ierror iiooio irereo irrour oberiu oberoi oooooo orbier orobii orrour ouerre ouioui ourebi rebore rebour reiber rerobe reueir reuere reuire reuour ribber ribbie ribero ribibe ribier rieber riuere robber robbie robbio roeier rubbee rubber rubbie rubier rubrie rubro- rui-be uburoi urouer uroure