-aaa- aaaee aabaa aabba aabra aarau abaab ababa ababe ababu abaer abara abare abaru abbar abbur abear abeau abeba abebe abeer abera abere aberr abrar abreu abura aburr aeaea aebbe aerru ar-ab arab- araba arabe araea arara arare araru arbab arbar arbee arber arbre areae arear arere arrau arrea arrua aruaa aruba arura aruru auber aurae aurar aurea aurra baabe babar babau babee baber babra babur baraa barab barar barba barbe barbu barea barer barra barre barru barua bauer baura baure bauru bbbee bbear be-er beara beare bebar beber bebra beebe berar berau berba berbe berea berra berre berru beuer beure breba brebu breer brera brere breu- brrar brrrr bruer bubba bubbe buber buraa burea burra burru earar ebara ebber ebure eeeee erbaa erbar erbbe erber erear erere eurre ra-ra raaba raabe rabab rabba rabbe rarae rareb raree rarer rear- reaue rebab rebar rebbe reber rebra reere rere- reree reuar reuer rubab rubba rubee ruber rubra ruere uber- uraba urare urbar urea- ureae urera urrea urubu uuuuu