b-r-k bbbee bbook be-er be-ro bebek beber beebe beeke beker bekke bekko bekok berbe berek berk- berke berko berob beroe berok beror berre bo-bo bobek bobko bobok bobr bobre boeke boero bokeo boker bokko bokok bokor booer booke booko boore borbo boree borek borer borko boro- borok boroo borre borro breek breer breke breo- brere brobo broek broer broke brook brrrr ebber ebeko ebook eeeee ekeko ekker eorre erbbe erber erere erkko eroor erore error k-rob kebbe kebek keber kebob keere kerek kerre ko-ko kobee kober koker kokko kokor kokre korbe korbo korek korke koror korro kre-o kreek kreke kreo- kroke o-r-b oboro obreb obrok okeke okere okker okobo okoro oo-er ooooo oreo- orere orero orobe orobo oroer oroke rebbe reber reere rekke rere- reree rerob ro-ro robbe robbo rober robo- robor roero rokee roker rokke rokkk rooer rooke roore rorer rorke