bbbee be-er be-ro beber beebe beffe befoe befor beher behof beofe beoff berbe bereh berhe berob beroe beror berre bheer bhore bo-bo bo-ho bobr bobre boero boffo bohor booer boore borbo boree borer boro- boroo borre borro breef breer breo- brere brobo broer brrrr ebber eeeee efere effer efore eofor eorre erbbe erber erere eroor erore error febre feeor feere fefor feher feoff ferr- ferre ferro foore fore- foreh foreo forro freeh freer frere frobe frore h-e-b he-he he-ro hebbe hebe- heber heere hefer heffe heore heroe herre herro hhhhh ho-ho ho-oh hoboe hobor hobro hofer hohoe hooer hoore horeb horhe horre horro hrere o-fer o-r-b obhor oboro obreb offer offof offre ofher oh-oh ohfoo ohrob oo-er ooher ooooh ooooo oreo- orere orero orfeh orfeo orfoe orfor orobe orobo oroer rebbe reber reefe reere reerh refer reffe reffo reher rehoe rere- reree rerob rheo- rhoeo ro-ro robbe robbo rober robo- robor roero roffe rofor rohff rohob rooer roofe roore rorer